This, like the first reply, is also incorrect.
Yes, it's been established in this thread that there is something else that's causing this issue with 4K monitors. There is, as of yet, no marked answer for this question.
Be sure to report this issue via the Feedback Hub in Windows.
I have had this issue since I installed Windows 11 Pro on a brand new PC, 2 months ago.
It's NOT related to Auto Arrange Icons, as I never turned it on (and it IS off)!
It's NOT caused by Onedrive, as it's uninstalled!
It's NOT related to 4K resolution, as I use dual 1080p monitors (side by side)!
Maybe it's to do with the total desktop width? 2x1920 width ~= 4K width...