Interruptions seem common, someone usually walks up to the singer of guitarist mid song to ask them something, not at all considering the band are mid number.
We played an outside gig the other week where this happened due to a lost bag. She repeatedly harangued the guitarist for multiple announcements. Turns out the owner was standing next to her (and said bag) all along.
’come on love, we’re trying to close the set’ was overheard...