At random times Fopnu has been crashing/exiting at random this past week or so.

I finally ran it from the terminal and I get this message when it crashes:

Gtk:ERROR:/build/gtk+2.0-ABXlu1/gtk+2.0-2.24.32/gtk/gtkimage.c:2127:gtk_image_expose: code should not be reached

I am using Debian (10) Buster with its latest updates.

I soon will be updating to Debian (11) Bullseye to see if stops.