GPU loaded only to 32%, motion while editing is freezing :(

After last update I start have only problems: 

1). When I need to move some detail in source (using "Motion" / "Position" and/or "Scale" parameters), its working like I use extremely old machine - jerks during movement, moves with interruptions, one move in one second, so I can't do it softly and comfortly find best place for placing.

2). Now, while rendering I can see, that busy only GPU. But! The GPU loaded only to 32-40%. And I'm not shure on 100%, but I think previous rendering method (when "CUDA" was choosed in project settings) CPU was loaded to 80-95% ang GPU from time to time loaded from 4% to 60%, was much faster. 

3). Now the active element automatically switching to element, located in track, selected as "Source patching for...". So after update I need select needed element every time, when I need to edit keyframes. It is extremely uncomfortable! 

If it matters, I use AMD Ryzen 9 3950X, 64GB RAM and RTX2080Ti, all SSD. 

So, the question is: am I dont't understand something, or now installing previous version of Premiere is really good idea, till everything, about I wrote above, will fixed?