Not really sure what happened. More amused than anything.
Two days ago, I had two browser windows, steam, and two other applications open across the two monitors on my machine.
While interacting with one browser, everything else vanished. Steam wouldn’t respond via the panel, but I could launch games in the recent list. Alt-tab only had the browser, nothing else.
Nothing that vanished was on other workspaces. (I thought I’d somehow managed to switch the active browser to a new workspace, but maybe not?)
Today, two reboots later (I shut my computer down at night) about an hour after I booted up, the browser that disappeared came back. Same pages and even paused where the video had been at disappearance, which hey great, but still weird.
My computer is a Bermuda triangle.


Good ideas to investigate. Thanks for the suggestions. :)
At time of disappear, the keyboard was turned off (Bluetooth, I was watching videos) Only mouse was in use, and the focus was on a non streaming browser. (Disappeared streaming browser was on monitor two, steam and other items that disappeared were on primary monitor) I’ve since wondered if I somehow hit just the right combo of buttons on the mouse to cause it, but no luck reproducing.
I don’t have restore previous sessions turned on. The haunted browser came back after a full day of normal use and two reboots. Having it reappear at the point in the video I’d been watching (and have since finished) really made me double take.
I use display port for both monitors, and have since installing this OS. Cables have not been reseated since then. I did have trouble getting both working correctly, (Nvidia card) so will double check that I don’t have a ghostly monitor installed to the system.