Steps to Reproduce:
1) Join a world and run /effect give @s nausea 99999 0
2) Rejoin the world or Travel to the nether
3) Notice that the Nausea effect starts again
This also works with Distortion Effects set to 0% as the green overlay slowly reappears after rejoining
Linked issues
duplicates 1
Comments 2
Duplicate of MC-196428.
I've just recently updated MC-196428 to mention that this issue occurs when players' NBT data is reloaded. MC-196428 was previously just exclusively about how the nausea effect resets when changing dimensions but I've made the appropriate alterations to state the core problem. 🙂
Fixing this will simply require reading and writing the nausea effect speed to the player NBT.
Really trivial fix.