I swapped out my Lenovo T460p for the laptop in the subject. It's connected to the same 3 monitors the older laptop had been (ThinkVision X1 27" 4K flanked by 2 Dells @ 1920x1200), although now through a Lenovo Thunderbolt dock.

I've noticed that if I drag a window up and down on the center 4K display, the mouse will gradually drift from its original position on the window title bar (mostly vertically) and sometimes jump a centimeter or more. This presents the effect of the window snagging/hesitating when moved.

I had left/right corner snag control enabled when this happened. When I also enabled top/bottom corner snag control, the effect diminished greatly, but I noticed some left/right drift after that change.

Exiting DF causes the problem to go away completely.

Windows 10 21H1 w/all current updates, DF 9.9.

Here you go. This is a fairly mild example; it seems to be worse the more "crowded" the display is. Note that it does not happen when DF is not loaded.

Attached. Thanks for looking into this.

Settings export attached.

This is so weird. It happens very randomly; sometimes the mouse cursor is displaced as much as an inch or two from where I grabbed the title bar, and can happen on simply moving a window. Much of the time it's not that noticeable, but it happens enough to be annoying.

Thanks again for looking into this.

Sure seems to. Mouse cursor stays right where it should. Thanks for the fix; I don't use the now-disabled features, so I'm good to go. Hope you can find the culprit for the folks that do