No idea on why it happens did test alex's mobs potions but they were fine
https://streamable.com/6zvwod

Forge 36.2.39
ars_nouveau-1.16.5-1.25.10.jar
greekfantasy-16.5.5.jar
geckolib-forge-1.16.5-3.0.106.jar
curios-forge-1.16.5-4.0.5.3.jar

Attempting to make either spell damage or mana potion long form turns them into a mirroring potion

Reported to both mods invovled gits