Evandyrr

can confirm.
amd ryzen 7 7800x3d
rtx 3070 575.57.08
Kubuntu 25.04 x86_64 kernel 6.14.0-15-generic

to reproduce, simply have local_difficulty enabled via f3 + f5, then press f1 to hide ui

can confirm and create the issue
it seems that all potions get recolored based on the first one you have in your hotbar, of the same cataglory.

for example, if you have a splash potion of weakness in your hotbar then restart the game, all of your splash potions will be the color of weakness.

if you have lingering potion of slowfalling, theyll all be the color of slowfalling.

arrows are affected as well, following the same pattern