Playing All the Mods 10 (NeoForge 1.21.1)
PotionsMaster version is 0.6.8-packdev
Not sure what version caused this but it was working fine a few weeks ago. OreSight works like normal until you apply any source of Night Vision -- Vanilla, Ars Nouveau, Charms from this mod -- same thing.
If this is not a direct conflict with baseline NeoForge then I apologize for the issue submission and the conflict lies with some other mod.
/Vegi