Bug observed with Proteus Special vs Manashield.
Version: 25.1.2 build 689
When: during alliance war attack.
What happened: I used Proteus’ special on opponent’s central Rigard. I saw the “Manashield” text indicating the talent triggered.
What should have happened next: no-mana-gain debuff applied to Rigard’s neighbors (Azlar and Kaliden) but not Rigard. Poison debuff applied to all three heroes.
What actually happened next: no-mana-gain debuff not applied to any of the three heroes. Poison debuff not applied to any of the three heroes either!
After casting Proteus it was still my turn, so there wasn’t any opponent action that cleansed the debuffs.
Proteus did not have an accuracy debuff at the time. (And in any case triggering Manashield requires a hit, which then should have applied poison.)