Hi,
while cutting a 4K video on a 2K timeline, I also have this problem of jumping footage while dragging the position with my mouse.
Other as the previous users over here, I am using Linux and here I just work on a bigger project with many zoom-ins and position changes within zoomed 4K footage.
Using stable version 16.0 or latest public 16.1 beta 2 makes no difference, the behavior is still the same, maybe the jump starts later than on earlier versions, but it still jumps.
In a german-speaking resolve board, all users could reproduce the same issue on various installations from 15.3 to 16.0 stable or latest beta. We found out, that not only Windows10 or Linux installations but also Mac installations show the same behaviour.
Still hoping, this will be fixed some time.
Other than this, I really love DVR, even if I just really start working with it - while leaving Adobe after 20 years!
Greetings,
Cy