5D Mark III and Cam Link 4k - lack of clean hdmi

Hi,

Recently I'm struggling the issue with 5D Mk3 and Cam Link 4k. Using OBS or any other software I see LCD view only on the laptop, no chance to change to clean HDMI.

Tested with firmware 1.2.3 and 1.3.6. Hdmi+lcd output: mirroring/off doesn't change anything. ML doesn't change anything. Video mode like M, P and so on doesn't change anything.

I plugged hdmi to TV and after pushing Info button a few times I could see clean hdmi. So the hdmi-mini hdmi is ok. I checked the capture card with xbox I see 4k. I tried EOS software is ok. But only cam link 4k - 5d Mk3 does't work - if I push info button I see all the same views like on tv, only the one with clean hdmi is missing.

The issue is not to disable all the parameters and histogram, but to see hdmi output instead of LCD view mirror. Found same issue a few times on different pages, but with no solution.

Appreciate your help!