Labels sometimes don't fully redraw after text change when the size has changed
Sometimes labels don't fully redraw when their text has changed such that it affects the size of the widget. This can leave either parts of the old label on screen or cause the new content to not be fully drawn. This primarily affects quickly changing labels, such as used by some extensions (see examples listed below). It might also affect the gnome-shell clock (more likely to happen if showing seconds) when used with a font that does not have monospaced numbers.
Original report:
Need advice for our extension issue, after a few gnome 40 updates extension refresh abnormally :
https://github.com/biji/simplenetspeed/issues/32
https://github.com/paradoxxxzero/gnome-shell-system-monitor-applet/issues/685
Edited by Sebastian Keller