my zoom app on pc is flickering

i have a PC, win 10. intel 7, 8gb ram.

camera kiyo pro.

in the middle of a zoom meeting, few time during a one and half hour meeting, the picture suddenly flickering and two times disconnected.

it begane 3 weeks ago, i did not do any change at all.

i restarted, uninstalled and reinstalled, clean my PC with CCleaner and more like this.

I checked the camera in other apps. it works there perfect. 

what can I do?
best regards