Nextcloud Talk: No Audio with desktop browser

I have installed Nextcloud Talk 7.0.2 and it works really good with just one problem: on my Mac (10.15.4) I can’t hear any audio. Chat works well, video works, even the other participants can hear my audio. But I don’t hear any audio. Tested with Safari and Chrome.

With Nextcloud talk on the iPad and iPhone everything is ok, even audio. Any ideas?

Did you ever get this fixed? I’m having the same issue.