I'm using a teleportation mod in my pack and during one of my prior visits to the savannah I ignored a wormhole.
Just now when I returned, despite being unloaded for 2 irl days and going through a server restart the wormhole is still there.

I bring this up because there is potential for there to be some world-lag if unloaded portals don't despawn like a normal entity would.

Additional Mods installed:
- Antique Atlas
- Atlas Extras
- Baubles
- BetterBuildersWands
- BetterFoliage
- Chisel
- Chisel & Bits
- Dynamic Surroundings
- Embassy
- FastLeafDecay
- JEI
- LongerDays
- MouseTweaks
- Rustic
- Signpost (Teleportation Mod)
- SimplyEnchanting
- Soundfilters
- TheOneProbe
- Toolbelt
- TreeChopper
- WearableBackpacks

Thanks for the report.

I don't think this is going to be an issue, as they should still despawn after 5-10 minutes of actually being active. I'll move it to internal to confirm, though -- keep an eye on the ticket status!

The site wasn't allowing me to add additional details last night so here they are now:
Upon further inspection I've noticed that it seems the portal may or may not just have spawned in the exact same spot facing the same direction three times in a row.

Was this in water, by any chance?

The current recurring total is 7 times (Due to me being in the area for a very long time) in varying positions (within 15 or so blocks of one another) all facing the same direction, and yes, all of them spawning within a small pool of water within a Savannah.

Honestly... Now that I think of it... I don't actually recall a portal spawning anywhere other than in water.

...yup, I've noticed the same thing. I'll put up a new internal ticket for that issue, and will close the old one. I'll also update the title of this ticket so we can re-use it for the underlying issue.

Yeah it happens to me too, my house faces water.

https://imgur.com/spOlQhR
https://imgur.com/KtlZhs7

Do we have any updates on this? This was reported two months ago, and it's only getting worse. I'm getting 14 FPS near my base:

https://i.imgur.com/dbS0Qjs.png

Is there at least a way to remove them, with a command or something? And can we disable their generation?

This should be fixed in newer builds, so closing this ticket!