It's difficult to see what's going on in your videos.
The first one, analog, shows that you are on system 2 and then the screen turns off and when activated again it's still on system 2.
Then it switches to system 1 after 7 seconds and stays there till the end of the video, about 7 seconds. So both systems are scanned for at least 14 seconds according to the display.
The second video where you added fav list 5, DMR, it stays 3 sec on system 1 and then scan system 2 in a blink followed by the DMR system and then the 3 sec scan cycle repeats.
Which video are supposed to show the problem?
According to the display it scans slow when you do not have the DMR system in your scan, but you say it is the oppsite, slow scan when DMR system are in use?
I still believe it to be a display update problem so please try that scan time check I suggested which will show the real scan rate.
/Ubbe