Welcome Page/Cannot join w background set + camera off

Hi Jitsi’s,

I did recently an upgrade to 1.0.4900-1 and found an on the welcome page. If a user has set avirtual background and tries to join a meeting without camera he is not able to do so. If he reenables the camera on the welcome page he can join without an issue. Is that a known bug or just an issue with my config.
Error when I click join meeting on welcome page with bakckground set and cam disabled:
2021-05-03T14:13:38.291Z [JitsiMeetJS.js] <Object.getGlobalOnErrorHandler>: UnhandledError: Cannot read property ‘getTracks’ of null Script: null Line: null Column: null StackTrace: TypeError: Cannot read property ‘getTracks’ of null

Uncaught (in promise) TypeError: Cannot read property ‘getTracks’ of null

Thanks for feedback,

Max