I have had this happen now a few times with W11. Do not know if this is something that Libre Office can deal with. But I work with multiple monitors. If I tell a “writer” window to minimize, I may not be able to get it back short of killing LibreOffice and then restarting it where once it does recovery, that window is now on the designated primary display (where I wanted it to start with). But nothing short of that works. I can get the icon in the tool bar to display the windows not seen, and I can right click in it (w11) and it may or may not give me the “move” option. If I can’t get it to show the move option, nothing else works to use the arrow keys to get it back on a display. I’m fairly sure this is actually a W11 deficiency because W10 worked.
Except, as a few have said in that topic, it doesn’t work for W11
– For me it did for months and then stopped after putting on a
Windows update.
It is not like I have never experienced this. I’ve been running
with 4 external displays for over 5 years. W11 did work
initially, but then some update from M/S broke it.
Part of the problem is, if you have a monitor that is designated
as “primary” and W11 is using the option of minimizing the
displays for a display that stops responding, it is actually
moving that “window” (for the application) below the level of the
task bar on that display and now you can’t get it back. The
solution is for Libre Office, terminate Libre Office and restart
it!! Don’t have to do this with FF, Thunderbird, Vista (TN3270E
emulation of mainframe monitors), Chrome, Adobe, and others.