SUMMARY When pressing the button in the middle of the graph (the circle containing the current folder size) the mouse has to be moved for repeated presses. STEPS TO REPRODUCE 1. Scan a directory 2. Go into 2 subdirs 3. Press back 2 times without moving the mouse a single pixel OBSERVED RESULT The second press doesn't work. The mouse has to be move in order for the 2nd press to work again. By pressing two times the software will only go up one directory. EXPECTED RESULT The button reacts to both presses and goes back 2 directories. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Yes (available in About System) KDE Plasma Version: 5.16.5 KDE Frameworks Version: 5.62.0 Qt Version: 5.13.1 ADDITIONAL INFORMATION While not moving the mouse is very unlikely on a desktop it can certainly happen with a touchpad.
Note: Pressing really fast usually does work. Wait 1 to 2 seconds between each press and it won't work as reported.
I've tested on filelight 21.03.70 and it doesn't seem to be keeping a full history at all.