Panel placed on second monitor won't stay put

EDITED TO ADD: Two days later, inexplicably, the panel on the second screen stayed on the second screen. There had been no hardware or software changes, no driver updates. But now it works as expected.

Hmm. Edited AGAIN to note that the panel on the second monitor no longer appears on the second monitor. Adobe is just "funning" with me, eh? Minor annoyance. Not resolved.

After buying a new computer, I'm having a small problem with Dreamweaver. Two monitors are attached to the computer and I have placed one of Dreamweaver's windows (Assets, Snippets, Insert, and a few other items) on the second monitor. I defined a new workspace with this arrangement, but when I open Dreamweaver, the panel that should be on the second monitor is back on the primary monitor.

Also, if I choose another workspace and then switch back to my preferred workspace, the panel returns to the primary monitor.

This worked properly on my old computer. It's not a huge probelm. After all, I can just drag the panel where I want it. But it is annoying. What should I do to to resolve this?

Thanks!