Non-primary windows disappear after exporting in 23.5

Hi jstrawn,
On Premiere Pro 23.6, I experienced exactly the same issue (on Win. 10 / 64), with a second monitor plugged by HDMI. Indeed, untied windows like Effects or Timeline suddenly disappeared after exporting (in Premiere directly, or even via Media Encoder). But not Lumetri Monitor (also one of my untied windows) or Project, for instance. And it not happened everytime, but often, and my solution was also to reboot Premiere -- wich seemed to mess my export up (a full black video with good sound at the end).

Make changes of spacework doesn't re-create the problem for me, untill now.

Thanks for your consideration,

Alexis from France.

Win 11. Main monitor on display port, secondary on hdmi both from GPU. All premiere windows on secondary monitor dissapear on export if I am active on the secondary monitor. If I am active on the primary monitor, sometimes the secondary monitor doesnt dissapear, but most of the time it still does.

I'm on Windows 10, both my monitors are running off DisplayPort out of my graphics card. The problem only seems to happen when I attempt to export media. 

People that are seeing this, please tell me:
Are you seeing it on mac or win?
How is your second monitor hooked up to your system? HDMI out, Video card port out, or other?
Can you get the problem to happen just by re-configuring workspaces out on the 2nd monitor? Or does it require Export Media to happen?

The issue still occurs for me constantly, there's like a 50% chance of it happening every export. Sometimes my main window will come back, sometimes I have to switch to a different workspace and back. It's really annoying.

Crazy, but for me the problem sponteneously dissappeard. Haven't got a clue why or how this happened.

Same problem. Crazy annoying

I've updated to 23.6 and can confirm this issue is still present. 😕😕

Sending you a DM now

@KarthXLR @Michel5FFD Or anyone else in this thread. Are you willing to work with me directly to repro this? If so, can you send me a direct message so that I can get a video or set of still images to see what is actually happening here?