FYI, one of our QA just got back to me after investigating this; it appears there's an issue when:
- Multiple characters have a passive that triggers status effects at the start of battle
- The above characters are all protected by Immunity Talismans
- An enemy has the Prisoner
Basically, the key is more than one character on a team doing start-of-battle effects against a Prisoner team. In this case, only one of the characters with the passives will trigger (I presume you saw Repeal function correctly, but not Daze).
Due to where we're at with the next update, it's unlikely it'll be fixed in time for that, but we'll make sure it's in our system to prioritize for a future update.
EDIT: Also, thanks again for the detailed info; our original attempts to reproduce this didn't see the bug due to using less characters on each team, so your full loadout info was key to identifying the way to reproduce the bug.