This seems to be a random but that happens on servers. The bug has been seen on other servers and has been almost surely confirmed to not be a Sponge bug or Griefprevention bug. When the bug happens, the message "You sent out (pokemon name)" stops outputting and no players on the server can send out their Pokemon. This bug has been seen on multiple Sponge versions and as of today, with my server being on latest Forge, Sponge, and other plugins, it must be a Pixelmon bug.

I hope others will comment on this thread with any more information.

Please excuse typo - bug*

I can vouch for this, it has started happening recently (quite randomly) without me changing anything on my server as far as sponge or plugins go. This is quite a major issue as the only current fix is a server restart, and it tends to happen multiple times a day so it is insanely inconvenient. . .

I am running:
Pixelmon: 5.0.1
Sponge Versions: I was on 2022 until today, I am now on 2034.
Forge: 12.18.3.2202

I've had this happen twice in the past 2 weeks. With this being a rarer occurrence for my server & factors listed below, leads me to believe that it is more than likely a Sponge issue however there could also be a few battle errors that cause this via Pixelmon. We do have on numerous occasions trainers with their Pokemon out yet no players in battle.

I am not using GP, I am using Polis. All of the others experiencing this are using GP.
I am using a slightly older version of Sponge- 2010. I will update to latest tomorrow morning so that I can be online to monitor for an extended period of time to see if it becomes more common similar to those above.

I am using Forge 2185. I will update to the latest Forge during my test as well- it could perhaps even be a Forge issue.
My server automatically restarts every 4 hours.

Blood suspected it being an issue between Sponge & GP initially. However since I'm experiencing this as well(yet on a rare occasion) things don't quite add up. Hopefully we should see more consistency when I upgrade.

Blood has been adamant about this being unrelated to GP and Sponge.

Reason I say that above:
https://gyazo.com/6c5972c0f4468117246a8cbf0a5cf84f


I think it is important to acknowledge the experience Ras had with this issue a while ago:
https://github.com/SpongePowered/SpongeForge/issues/901

This seems to be the same bug. I am not SURE if it's a pixelmon bug or a pixelmon+sponge bug.

From the standpoint of a player, this bug absolutely ruins everything as is comically illustrated here:
http://www.pixelmonrealms.com/forums/m/ ... /last#last

I've had this happen to me a total number of 6 times in the last week, at some times happening multiple times every day. From what I've seen this issue is quite random. For example a few days ago I had this happen, restarted and 30 mins later it happened again. After that it stopped and then came back two days later, stopped again and now it's back happening multiple times daily.

My server has no type of npcs which can be currently battled leading me to believe this isn't a factor in this bug. (Relating to Dys above and his trainers) I first experienced this bug while running sponge version 2022 and forge 12.18.3.2202. I'm currently on sponge 2032 and forge 12.18.3.2209 (Been running for 11.5 hours with an auto restart 4 hours ago and no issues so far).

Additional Info: My server restarts automatically every 8 hours. Currently on version 2.3.0.233 of Grief Prevention.

I've been running on Sponge 2034 with Forge 2215 for a few hours now with no issues. Will report back at end of day if I don't get the issue before then.

INFO:
I just got the bug and tested a few things.
Snowballs work fine. You can spawn mobs with /spawnmob. /pokespawn works fine and the Pokemon appears.

Also, after the bug happens, the first time you hit R, chat output "You sent out X" appears, but the pokemon does not. Every time you hit R after that, no chat output and nothing.

I can also vouch that this issue occurs, and it does seem to either be a Pixelmon or a Sponge problem.

To all servers having this issue - update to the latest SpongeForge, and its corresponding Forge. The issue is caused by a re-toggling of the GP flags, happening when SF is not matched to its Forge. The flags will look set in /cf, but they are not - retoggling, or restarting the server will refresh them.

If there are any more issues, I will re-open the ticket.