Hi @luc4, you might check out my post regarding my wireless G305 several days ago. For me it was simply a case of re-plugging back in the dongle. I don’t believe mine is technically bluetooth and I don’t control it with the blueman-manager. However, I do have a pair of bluetooth Bose headphones so I’ll test those shortly and I’ll report back if I have sound problems.
I saw your profile card as you being on the stable branch so you may want to update your profile showing what branch you’re on and what you currently have running (and your mouse too.)