Minecraft v1.15.2
Forge v31.2.31
Astral v1.4.15

If the player's body dies or takes damage, the player will die or take damage in creative mode.

This is supposed to be intended behavior.

In creative?
And the medicine bowl is still consumed in creative.

I believe potions and the like are still consumed in creative. I could change the body to not take damage if the player is in creative, but that will take time

Ok, thanks.
I meant to say that the medicine bowl is emptied when consumed in creative.