Sound output changes by itself in Jitsi Desktop

We use a headset for conversations with Jitsi Desktop.
Sometimes randomly the sound output changes by itself and we can not change it even if we always see 2 devices and the headset works with other applications. When we restart Jitsi we can change the sound output again. Is there a solution to solve this problem?

The version of jitsi is 2.10.5550

Thank you for your help