Now I had time to test the PreVersion.
Switching between HD MadVR and TV on EVR with TV works perfectly. Even when stopping the movie, MP switches back to the standard resolution 50 or 60 Hz.
With HDR-UHD the switching from live movie MadVR 24 Hz to TV 50 Hz works perfectly.
However, if the HDR-UHD movie is stopped or rewound back and forth, switching to the standard resolution often does not work. The resolution then remains at 24/23 Hz.
The error is only with UHD-HDR movies.
Enclosed the logs .....
Thanks and Greetings
Tried to reproduce it but no 4k here and I wasn't able too