iMac Pro 2017 Adobe Illustrator poor performance

Hello Guys!

It's about an iMac Pro - 3.2GHz 8-Core Intel Xeon W processor, Turbo Boost up to 4.2GHz, 32GB RAM, 1TB SSD, Radeon Pro Vega 56 with 8GB HBM2 graphics memory

We use the latest version of the Adobe CC 2018. The device has been completely reinstalled and no extensions or similar installed. Nevertheless, Illustrator and InDesign are very sluggish. InDesign has very long load times when scrolling multiple sheets.

i.e. if I have a document with 25 pages and I want to go from page 1 down to page 6, everything stops for about 15 seconds, I just see the beach ball and then suddenly it goes on. Should not be a problem for this device? (File is locally on the desktop, no server or network drive)

Now the main Problem.

In Illustrator we have the bigger problems, if we simply draw 2 squares here, and move them in the path view, everything is delayed, the squares follow the mouse with a little delay until they finally arrive where they have to go. Without path view it works quite normal.

In addition, if we zoom in on a drawing and move it with the "hand tool" or space bar, it's like the picture moves at only 2 fps ....

For such a device in this price range or hardware, these steps should actually be no problem at all. Unfortunately, I have already tried many things. Also the steps of the help page (https://helpx.adobe.com/at/illustrator/kb/optimize-illustrator-performance-mac-os.html) - without any change.

Are there any problems with the hardware? Too many CPU cores or graphics card not supported? Well, maybe you guys have the same problems with Adobe and an iMac Pro... I would be very grateful!