Entered a raid battle, my pokemon was defeted by the raid pokemon on turn one. Soon after, the "pokemon was revived" message popped up, but my pokemon icon and lifebar did not come back. I was unable to select attacks or be targeted by the raid pokemon, as if I hadn't been revived at all. After the battle, the pokemon in question was fully healed, not fainted, as if it had been revived during battle (I entered the battle with 1 HP)

Log below:

[19:13:43] [Server thread/INFO]: Saving chunks for level 'ServerLevel[ocean pixelmon]'/minecraft:overworld
[19:13:43] [Server thread/INFO]: Saving chunks for level 'ServerLevel[ocean pixelmon]'/minecraft:the_nether
[19:13:43] [Server thread/INFO]: Saving chunks for level 'ServerLevel[ocean pixelmon]'/minecraft:the_end
[19:13:43] [Server thread/INFO]: Saving chunks for level 'ServerLevel[ocean pixelmon]'/pixelmon:ultra_space
[19:13:43] [Server thread/INFO]: Saving chunks for level 'ServerLevel[ocean pixelmon]'/pixelmon:drowned_world
[19:15:01] [main/INFO]: Loaded 551 advancements
[19:15:09] [main/INFO]: Loaded 552 advancements
[19:16:10] [Sound engine/ERROR]: Stop: Invalid parameter parameter value.
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:91]: Caught error in battle. Continuing...
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: java.lang.NullPointerException
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.reviveAfterDefeat(BattleController.java:861)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.participants.RaidPixelmonParticipant.onEndTurn(RaidPixelmonParticipant.java:355)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.endTurn(BattleController.java:765)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.update(BattleController.java:515)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.BattleRegistry.updateBattles(BattleRegistry.java:248)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.BattleTickHandler.tickStart(BattleTickHandler.java:13)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.ASMEventHandler_114_BattleTickHandler_tickStart_WorldTickEvent.invoke(.dynamic)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus$$Lambda$3259/965427421.invoke(Unknown Source)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.fml.hooks.BasicEventHooks.onPostWorldTick(BasicEventHooks.java:100)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:857)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:787)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:118)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:642)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:232)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer$$Lambda$9382/519267807.run(Unknown Source)
[19:17:35] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at java.lang.Thread.run(Thread.java:745)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:91]: Caught error in battle. Continuing...
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: java.lang.NullPointerException
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.reviveAfterDefeat(BattleController.java:861)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.participants.RaidPixelmonParticipant.onEndTurn(RaidPixelmonParticipant.java:355)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.endTurn(BattleController.java:765)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.update(BattleController.java:515)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.BattleRegistry.updateBattles(BattleRegistry.java:248)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.BattleTickHandler.tickStart(BattleTickHandler.java:13)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.ASMEventHandler_114_BattleTickHandler_tickStart_WorldTickEvent.invoke(.dynamic)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus$$Lambda$3259/965427421.invoke(Unknown Source)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.fml.hooks.BasicEventHooks.onPostWorldTick(BasicEventHooks.java:100)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:857)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:787)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:118)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:642)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:232)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer$$Lambda$9382/519267807.run(Unknown Source)
[19:17:44] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at java.lang.Thread.run(Thread.java:745)
[19:17:57] [main/INFO]: [CHAT] Wingull is unable to battle!
[19:17:57] [Sound engine/ERROR]: Stop: Invalid parameter parameter value.
[19:19:05] [main/INFO]: [CHAT] Wingull was revived!
[19:19:24] [main/INFO]: [CHAT] You found one Choice Specs!
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:91]: Caught error in battle. Continuing...
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: java.lang.NullPointerException
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.reviveAfterDefeat(BattleController.java:861)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.participants.RaidPixelmonParticipant.onEndTurn(RaidPixelmonParticipant.java:355)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.endTurn(BattleController.java:765)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.controller.BattleController.update(BattleController.java:515)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.BattleRegistry.updateBattles(BattleRegistry.java:248)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at com.pixelmonmod.pixelmon.battles.BattleTickHandler.tickStart(BattleTickHandler.java:13)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.ASMEventHandler_114_BattleTickHandler_tickStart_WorldTickEvent.invoke(.dynamic)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus$$Lambda$3259/965427421.invoke(Unknown Source)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraftforge.fml.hooks.BasicEventHooks.onPostWorldTick(BasicEventHooks.java:100)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:857)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:787)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:118)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:642)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:232)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at net.minecraft.server.MinecraftServer$$Lambda$9382/519267807.run(Unknown Source)
[19:19:57] [Server thread/INFO]: [com.pixelmonmod.pixelmon.battles.controller.log.BattleLog:onCrash:92]: at java.lang.Thread.run(Thread.java:745)
[19:20:24] [Sound engine/ERROR]: Stop: Invalid parameter parameter value.
[19:20:25] [Server thread/INFO]: Saving and pausing game...

Can confirm:

Thanks for the report, I was able to confirm this. Moving to internal. Keep an eye on this ticket for any updates.

I would like to add that the pokemon do show up in the overworld when the message of them reviving shows up and yet they aren't apart of the battle.