Glitch when cutting audio in multicam in Premiere2020

Hi everyone,

Since I upgraded to Premiere 2020 I've been having a lot of glitches.

A peculiar one is what you can see in the two attached videos: when you cut an audio track in a multicam sequence, it marks a few following frames as "duplicated/already used".

Has anyone experienced this? Could it be something different from a glitch?

Many thanks