I wanted to report a bug I found on Kallah Silverback in Drum Jungle while farming for aura jewels. Many spells that have any tier of spellements upgrades will still trigger his healing cheat despite being enchanted. Spells that have not been or cannot be upgraded, such as tempest, blizzard, etc., if enchanted will get around this boss's cheats cleanly.
This bug seems rather minor but could cause headaches for someone fighting Kallah at the appropriate level, as they are being punished for seemingly no reason.
I misunderstood the needs to meet Kallah's cheat. Simply using a prism on him should always prevent him from healing in retaliation. However, the fight can still be buggy with AoEs or other single target spells also not triggering his cheat at all.