I am having trouble with the Perform action. The Perform mechanics are not triggering reliably when my Bard/Warlock avatar uses the action. The music and animation plays, but it does not attract the attention of nearby NPCs, and the game does not roll a Performance ability check. Occasionally it'll get the attention of one distant NPC, but it still doesn't roll the ability check.
I found that one reliable way to trigger this state is to get caught while trying to sneak Sazza out of the Grove. After getting caught, even if I talk my way out of it, the Perform action stops working.
The ability started working again briefly when I first entered the Sacred Pool area, but it failed again when I tried to use Perform inside the Inner Sanctum. After that, I couldn't get the ability to work at all, except by reloading a save from before helping Sazza escape. I replayed that quest without getting caught (up to the point where Sazza leaves the area), and now Perform seems to work normally. Unfortunately, I've lost a few hours of play from the backtracking.
While I was trying to troubleshoot the broken Perform action, I noticed that some nearby NPCs responded like I was using Hide instead of Perform. Also, if I used the Hide action while performing, all of the nearby NPCs suddenly reacted to the music, and the game immediately rolled a Perform check. Between that and the Sazza quest, I suspect that there's some bug related to the Perform and Hide states.