Cam stream works fine for a few minuts

"Sandberg USB Webcam 1080P HD"

The camera stream works well for a few minutes, then it just turns black... Until you change the tab or renew the page, then you get a few more minutes... Then it turns black again.
What's wrong?

New to this so please help

have tested the camera on another computer and then it works without remark for several hours without the slightest interruption

Im using OctoPrint version 1.4.2 on a Raspberry PI 4b