I updated Mate recently (mate-about reports 1.16.0), and an issue I just noticed is that if I drag a window from my primary screen, onto my second screen, they dissappear from the WIndow List.
And I mean screen, not workspace.
I can get a window with its mid-point near my screen split. Drag left a few pixels and it appears in the Window LIst. Drag right a few pixels and it disappears from the Window List.
My 2nd screen is in portrait mode, if that is any issue.
Annoying, but not fatal.
All Windows appear as normal in ‘Alt-Tab’ selection.
Is there somewhere more direct I could report this?