I'm having an issue with the Plank dock (launcher) on Ubuntu 20.04. I have a configuration with the "Autohide" feature "on". Once I do any configuration change to the desktop (i.e. switching on/of an external monitor or changing the resolution of external/internal screen), the dock will not show up anymore on the mouse over, as it used to work normally.
The only solution so far is that I can start another instance (and have two, one hidden, one working, showing an icon of the other one), eventually kill the first Plank process and re-launch it, so it works again.
It also happens when I put my laptop to sleep mode and then reconnect it back to the dock with external monitors.
Even if I already have a quick fix, that is very frustrating.
Any help is appreciated.
Been having the same issue here. When I connect or disconnect my extarnal USB-C screen I loose plank.
Only way I found to "fix" it was to run a
killall plankfollowed by restarting plank from the application menu.