Thank you for your reports on this. Microsoft is working to re-enable secure support for virtual camera apps on the Mac client. Until then, you can use the virtual camera in Teams in Chrome or Edge on your Mac.
We will update here and at the link below when there is more news: https://docs.microsoft.com/microsoftteams/troubleshoot/teams-on-mac/virtual-camera-doesnt-work-macos.
An error occurred while saving the commentRalf Richtsteiger commented
Can confirm both behaviors with current version 1.3.00.30874 (updated yesterday): lost focus but more frustrating is the missing teams window if you are on another space. Annoying.
And I think this issue needs more attention because there are a lot of similar issues that are related. For instance: