A just can't place dimensional plasma from bucket. Just nothing happens and there is no message that I'm at bad height.
I'm at good height and in config max height is set to 255.
Not sure, but the issue probably also occurred with default max height.
Also when I try to place plasma this message shows in latest.log:

[15:09:01] [Server thread/INFO]: Saving and pausing game...
[15:09:01] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/minecraft:overworld
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/minecraft:the_nether
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/minecraft:the_end
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/bloodmagic:dungeon
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/theabyss:the_end_of_time_2
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/twilightforest:twilightforest
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/dead_guys_untitled_deep_dark_:deep_darky
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/twilightforest:skylight_forest
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/theabyss:death
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/theabyss:the_end_of_time
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/theabyss:theabyssdimiceworld
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/blue_skies:everdawn
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/atum:atum
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/blue_skies:everbright
[15:09:02] [Server thread/INFO]: Saving chunks for level 'ServerLevel[Setupworld]'/theabyss:theabyssdim

I'm on custom modpack with around 170 mods.
If it would be helpful I can provide more informations like entire latest.log or something else.

Same issue, hope it gets fixed soon.

I also can't place plasma

Please provide the latest.log after recreating this issue. Also, try deleting your config and restarting the game so that the config regenerates w/ default values, and see if you can reproduce the issue.

I tried deleting deleting betterportals config folder and it didn't work. Under height of 15 plasma can't be placed. Also clarification - the log messages that I was talking about were generated by pausing the game not by your mod. Actually there is no any messages in the log. I will edit the main message to prevent miss understanding.

Heres is latest.log of game when I tried placing the plasma multiple times.
latest.log

Interesting, today I created copy of the modpack, and did few things on it:

• updated all mods
• removed optifine, optiforge and performant
• added sulfuric, roadrunner and magnesium mods (they are unofficial forge ports of the fabric performance mods lithium, phosphor and sodium

and on the copy the issue disappered
I tried recreating it with just optifine optiforge and and your portals mod, but it didn't worked so it's probably not optifine fault
Maybe performant (it also was removed in the copy where the issue disappered) ? I will try to test that tomorrow (if I don't forget)

Hope my informations will help.

We're having this issue and we do not have Performant installed. Nor Optifine or Optiforge. I didn't see anything in the log that'd give me an indication as to what the problem might be.