My camera input get "crazy" in combination with Zoom

[Kestrel1978]

Last week I started my lectures (OBS + virtualcable + Zoom). A strange thing happens, which not happened last year.

I run OBS and Zoom. I turn on Vitrual Camera. I then start screen share in Zoom, and use advanced option for sharing content from second camera, I switch until Zoom detects OBS virtual camera. This worked fine last year. But now when doing this suddenly my camera in OBS multiplies into 4 small displays and half transparent with "psychedelic" colours... I then turn of OBS and keep Zoom running with shared screen, then turn on OBS again, and then it works normally.

What could be wrong?

My setup:
Dell Alienware Aurora R7
Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz 3.19 GHz
NVIDIA GeForce - GTX 1070 Gaming Graphics Card
Windows 10 Home

Sony 4DR-AX53 connected with Elgato Cam Link

 

[Kestrel1978]

Here is screen capture:

Note: I have green screen and the background here is black. Restarting OBS solves the problem, but this happens too often.