This one is new on me. It started today, the moment I replaced one of my two monitors. Originally both displays were 1080p; now I have a 2560x1440 (125% scaling) and a 1920x1080 (100% scaling), on Win10. Logs attached from while replicating issue.

I have two functions I use constantly; one moves the active window to the top-right corner of the current display, one moves to the top left. Screenshot of the setting attached.

Since replacing the display, windows do not correctly relocate to the shared edge. For example, triggering "move to top right" on the right-hand monitor works fine, but triggering "move to top left" on the same display causes the window to stop ~10 or 20 pixels from the edge. This behavior is exactly reversed on the left-hand monitor; that is, "move to top left" works properly, "move to top right" stops short.

Of note, Window Snapping works properly if I drag the window against the seam.

That explains why windows on the right-hand monitor can't be positioned at the left edge.

But what about windows on the left-hand monitor not aligning to the right edge? The left-upper-corner of those windows remain on the same display as the body of the window, even if the (invisible) right edge crosses to the other display.

I understand the issue, but it doesn't sound like it should be symmetric.