When you write beep, you mean that Dorico plays the note ?
This is a known behaviour of version 1.0.10, it should quickly change, as far as I read in threads about that update.
I think we are many users to have turned the sound off, at least when inputing notes !
I want Dorico to play the note when I actually enter a note, but I don’t need or want it to play some random note when I’m selecting the various options before I actually enter a note.
It even plays a note when I select the rest button!