Audio quality/audio gets cut up

Dear Jitsi developers and users,

we regularly host a meeting on Jitsi with 10-15 participants on different devices. It often happens that some users are perfectly understandable for some users or some time, but then when they talk longer, the audio gets cut up. Is there any way how we could solve this problem? Is this about the browser oder desktop application? Is there a connection between using headphones and cut up or bad audio? (That’s something that seemed obvious to us, though not the only problem we have). We would really like to stay on Jitsi, but have to move to another plattform, if we cannot solve that issue.

Can anyone help?