Pac-Man Fever (Dream)

Hi all, I’m posting a weird issue here in hopes that somebody might be able to offer a solution. I have a Surface Pro X which I keep connected via USB-C to a Microsoft Audio Dock, which is in turn connected to a Dell S3221QS monitor. I generally keep the SPX off to the left side of the external monitor and I have them arranged accordingly in Display Settings. The Dell is my primary monitor, and the SPX is my secondary. Nothing too bizarre, right?

When I reach the edge of one desktop in the overlap area, the mouse pointer tracks across to the other as expected. But here’s my issue… the “Pac-Man effect” is not limited to the overlap area…meaning if my mouse pointer touches the edge of one desktop, then it immediately jumps down (or up) to the overlap area on the secondary monitor. It’s like there’s no logical boundary between the two. And given how much you need to be able to reliably point to, say, the corner of your desktop, it’s kind of maddening.

I’ve used multi-monitor layouts like this for years, and this is the first time I’ve ever run into such an issue. It’s also the first time I’ve used a WoA device as my daily driver, and it’s also the first experience I’ve had with the Audio Dock. But it’s worth mentioning that I also use a Dell Latitude (running Windows 10 Pro) with the same dock and monitor, and it doesn’t have this issue.

Has anyone else run into anything like this? Any suggestions? Thanks!