After fresh install of Kubuntu 18.04 I'm experiencing a really annoying issue.
After pressing Alt+F2 (to quickly execute something) I'm, thrown into the terminal - or console - or tty2 - simply completely out of GUI.
Then I need to press Alt+F1 to get back to GUI and then the quick launch is displayed.
Similar goes for Meta+left and Meta+right.
Is there any hack how to disable this behaviour?