For me it’s the “tap to change volume” on my Galaxy Buds Pro. Such a great feature that saves touches for other functions.
Unless I’m trying to eat while wearing them, especially crunchy stuff, which causes the volume to go haywire (and only on the right, volume up, side).
So I switch to a pair of USB-C Buds when it’s Doritos time.
Tap to change volume never works on mine (Buds2), except every once in a while when my ear moves (like when I’m eating), and only the once.