Happened again, this time when opening firefox right after gnome-terminal was opened and moved to the right side of the screen. The terminal window portion can be seen in the firefox window area.
Dragging and remaximising Firefox fixed the window.
Happened again, this time when opening firefox right after gnome-terminal was opened and moved to the right side of the screen. The terminal window portion can be seen in the firefox window area.
Dragging and remaximising Firefox fixed the window.