Using 3 x 32" monitors on w11 (25H2) in 4K with Cubase 15.0.30 Pro, I decided to extend the main project windows and its tracks to the full 3 monitors cumulated hyorizontal length. Just in order to record more easilly and see the various markers I created to drive me between various musical parts.
No problem in recording, but I then try to select several markers in the middle screen to copy them.
And here is the bug : the selection rectangle traced is not positionned and following mouse position but pushed some distance on the left ??
But the selection obeys to mouse selection, not to the dynamicaly built selection rectangle .
Not dramatic but poor 
Same DPI and everything à 125%…
A video to demo the pb :
And another problem I noticed : if I save my project with the project windows across the 3 4K Samsung monitors, when I re-open it, the same project windows position come back with an offset to the right by the same distance, a few centimeters, as that which appears in the video between the mouse and the rectangle.
This last point lets think it could be a W11 pb ?
Cubase do not receive the correct position, or interpret them badly.
Well curiously it disappeared after I applied the last Intel Gaphic drivers, v 32.0.101.8826,for my IGPU Core Ultra 7 270K Plus …