Hi I'm not sure if this is working as intended. I've noticed while killing treants that my Regeneration spell will eat my mana and give me the "begins to regenerate" message, but the buff icon doesn't show up. This seems to happen when I have the Creeping Crud dot debuff on me from a treant. I would not expect that dot to block the regen buff spell, but maybe it's supposed to work that way when cast by a treant? Figured I'd share in case this is unintentional.
Here is an obs capture showing me killing the treant, casting regeneration on myself around 0:18 (see chat box in bottom left showing the spell landed) but no regen buff applying.
https://imgur.com/a/LMMMWGB