I do have a 3-monitor-setup and the VST behaves very strangely. Using the VST on my main monitor (in Studio One), it is ok, but each time I try to select a style or real tracks, the pop up opens on my 2nd monitor, which is working in upright mode, so 90 degrees tilted. Therefore it opens "all over" the monitor, without any top bar. I can not easily close or resize it, because the handles are missing. Same with the yellow notification window, it opens up "somewhere", mostly on the 2nd monitor.
In addition the list view does not remeber the last settings, so I always have to resize each and every column to be able to read the content.

It's more of a windows problem.
Parameters / display / ..