statusbar disappears
This is almost certainly an upstream problem, but I don't know where to go upstream.
In gedit 3.38.1, the window is maximized, which is how I like to work. I have a document open. The statusbar displays. Eventually, sometimes, I realize the statusbar has disappeared. I don't know exactly when it disappeared. Editing still works but I can't see what the statusbar says. I do not remember the predicate, what I did that may have caused the problem.
For a solution, a kludgy one is to click the maximize/restore top-right button once or twice to resize. The effect seems to be of popping out from behind Gnome's desktop environment's bottom panel.
I suspect the problem is from either the statusbar or the maximize/restore functionality. If the statusbar is at fault, the statusbar may be auto-disappearing despite the preference having been set by the user or set by default (hamburger menu > Preferences > View > Display statusbar). If the maximize/restore functionality is at fault, it may be executing a demaximization that retains full window width and similar window height so that the demaximization is not obvious to the user.
This is with gedit 3.38.1 on Fedora 33 Linux, kept evergreen.
I have virtually the same problem with the LibreOffice Writer status bar (see https://bugs.documentfoundation.org/show_bug.cgi?id=139572) and the Firefox Find bar (via ctrl-f) (see https://bugzilla.mozilla.org/show_bug.cgi?id=1686364). The problem began only recently on all three apps, but I don't remember exactly when. The three apps likely have the same code from somewhere upstream.