Liberty air 2 stuttering during calls!

Hey everyone,
I have samsung galaxy s21+, with the most updated firmware and software (the earbuds are updated too).
I’m suffering from stuttering during calls.
The ‘non-master’ earbud stutters (whether if it’s L/R) and it’s sometimes sounds like they are ‘compete’.
tried to hard reset and reconnect BT, It doesn’t work.

Any suggestions?