I had submitted a ticket a few months ago (or email) and didn't hear anything back but the issue seemed to resolved itself? Now I am getting the same behavior where Alt+Tab takes a bit, if at all, to present the dialog showing what's open. I don't have much running right now compared to normal. I know a full restart will fix it, and maybe terminating and restarting DF will as well. Not sure what I can do to help remedy this.

Windows 11 Pro 22H2 (10.0.22621.0 Microsoft Windows NT 10.0.22621.0)
DF 10.0