Four monitors || Windows 10: mouse pointers stick to horizontal edge

Solution 1:

I can confirm as well that the issue (on Windows 10) is not fixed through registry entries or multi-tasking snap settings.

The issue is with the settings app auto-arrange / placement for muti-monitors that will sometimes look right but in fact cause the edges between some monitors to become "sticky" requiring higher mouse velocity to pass through.

In my case I have 6 monitors. A trial and error approach worked to fix the issue:

1. Take a problem scrren (5 in my case), overlap it with the adjacent that has the sticky edge (6)
2. Auto alignment breaks. Move the second screen back into place (6) overlapping to the left in my case.
3. Move the original one back (5), again overlapping.
4. Apply and Test. If not fixed, or if another edge has become a problem, repeat.

Images as follows:

Starting situation - looks right but red edge was sticking.

During trial and error fix:

Now fixed - looks the same as the start but problem resolved.

Solution 2:

Turns out there was some gap between the monitors; removing the gap fixed the issue. It looks like if there's a gap between monitors, the behavior is as described above in the question.

@harrymc's answer helped solve this, as changing the alignment created gap between another monitor that showed this behavior

The image below is the new displays arrangement, for reference. As we can see, there's almost no gap between the monitors #1 and #2 new monitor setup