Wacom Cintiq 22 Photoshop and Illustrator Performing Issues/BUG

Hi,

I have really annoying performance issues with photoshop cc and illustrator on my cintiq. I know my graphic tablet is not the problem cuz it works fine with other software and the problem is also not rooted in my pc (32 GB RAM, nvidia rtx260, intel i9, windows 10, every driver is updated). There shouldn't be any performance issues on my pc. 

Yesterday my Illustrator crashed a few times and I found out that I could roll back to an older version, which helped to make it run stable. My photoshop though is still lagging. It doesn't have problems when I paint for a while but when I switch to my main monitor with my mouse to open a program or reply to a mail and go back to my grafic tablets it takes ages to respond! I can't click anything for minutes! Anyone else has this weird bug?