Zoom 7.2.1 on Debian 13: webcam freezes or turns black when selecting any virtual background

Same here and i know multiple other guys which have the same problem on Dell laptops.

OS: Ubuntu 24.04

Secure Boot : enabled

Zoom: 7.2.1.5760

Have an internal webcam and an external USB cam.

Internal webcam does not work at all, usb webcam only works without any filters or backgrounds(HD works), otherwise blackscreen or freeze.

In 7.1.5.4332 everything is working as expected for both cams with effects and backgrounds...

Disabled all effects, HD, avatar ,backgrounds, hardware acceleration without any effect on the internal cam

zoom opens the cam device (fuser -v /dev/video0 showed this). No other process is running which tries to access the cam, only zoom.
Tried to use a virtual device like this with the same results:
sudo apt install v4l2loopback-dkms ffmpeg
sudo modprobe v4l2loopback devices=1 video_nr=10 card_label="Interne Kamera" exclusive_caps=1
ffmpeg -f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 -pix_fmt yuyv422 -f v4l2 /dev/video10
Selected „Internal Camera in zoom.

Only pinning to the last known working zoom version is now the “solution”, but that’s bad because of security issues.