Cubase 9.5 Pro problems

Asus X99A 3.1
I7/5820 / 32GB/3000mHz
Windows 10 updated
UR28M latest drivers
Perfect working on Cubase 9 but many droputs on Cubase 9.5.
Also Cubase 9.5 will not shutdown. Soory to say but Cubase 9.5 is unuseable.
I did al tweaks but no effect. Perfect DPC latency )see atachment’
Please advice