Yes, constantly. For instance I wander around the house listening to an audiobook on bluetooth headphones, walk into a weak signal zone, and the audiobook stops, and I hear in the bedroom that the bluetooth speaker next to the bed has mysteriously started to play a youtube video from my phone. So a momentary loss of signal causes the software to change both input and output. This is with a Samsung S9+.
I'm also on a Samsung (S20), so maybe they just particularly suck at bluetooth.