I never said it wasn't working; I was just notifying about this situation. Since some people might try the easy way of clearing the stage by instakilling the boss,
View attachment 238699
View attachment 238701
It says connection error, but seems to much of a coincidence only happens on certain boss battles, and only when a damage spell hits the boss.
This one is Lightning Card on both Stages' 30 and 35 boss, used a few seconds after combat started. You can test this too.
So far this seem to be triggering conditions:
>Battle starts as a duel you against the boss (no "warm up" phase)
>Boss dies from damaging spell card.
>This happens soon after battle starts.