Hi Peter, thanks for the reply.
Yes, I filmed at 50fps and I set the system to 50. And it works fine with files of the same session which happen to land in the CFAST but not those on the SD.
Actually, I do not even have to use the timeline, in the Master-view of Media it shows the same effect.
this is a little clip I took. Note that the first file is from the SD-card. The second is the first part of a file which was split into two due to a full Cfast. So the first part (Cfast) runs well but the second part (SD) of the same shot not. But all are being played well by the Raw-player.
All the little takes in the cfast run well in Resolve but the ones from the sd not. But they do in the rawplayer.
I tried different resolutions of the timeline with no success. It happens before the file hits the timeline.