Currently, I have found 2 bugs with this feature in Windows 10. This feature is listed under "Window Management" → "Enabled maximized window dragging between monitors" → "Show monitor selector while dragging" in DisplayFusion Pro 8.1.2.

1) When dragging a window, if the window is dragged to the side of any monitor multiple times (to the point that Windows 10 displays the "snap preview"), the monitor selector background will change from semi-transparent to solid black. I've tested this and been able to replicate the issue each time; though, the number of times it needs to display the "snap preview" before occurring changes between 1-6 times.

2) Occasionally, when dragging a maximized window to another monitor, the monitor selector will become "stuck" and not disappear after placing the window. Attempting to move a window again to "refresh" the monitor selector will not fix the issue. The only way I've found to fix it is to exit DisplayFusion and restart the application. I cannot replication this action and it does not occur often; however, I have witnessed it over a dozen times since using DisplayFusion over the past year or so.

I'm not really asking for a fix or workaround for this issue, as I could just disable the option and I'm sure I would have no problems. Just figured I would throw this out there to add to the bug list and hopefully others can confirm.

P.S. Both issues have occurred on multiple PCs with different monitor configurations/resolutions - all running Windows 10 (during which time has evolved from the preliminary release up to the Creator's Update).