Config:
InWorld Health bars enabled (show when hit)
the GUI in the top left corner got disabled

Issue:
Sometimes the bar does not update when dealt damage to the mob (it renderes the bar showing always 100%)
This bug seems to be random.

Reproduce:
Bug is present when playing this modpack: https://www.curseforge.com/minecraft/modpacks/minecraft-true-survival
People submitted this bug to me. I tried to fix it but it seems to be a bug from the mod itself.