Lock screen frozen after big input from keyboard

[piotrekkr]

Lock screen freezes after big input into password field from keyboard.

Few times I had to hard reset because cleaning service left my headphones on my keyboard for the night at work. When I got back to office in the morning lock screen was not responding. I could not clear password field. could not press anything on keyboard. Mouse was working but clicking on lock screen interface didn't work.

Wrote a question about this on askubuntu https://askubuntu.com/questions/1121906/how-to-prevent-cleaner-from-hanging-my-lock-screen-in-ubuntu-16-04

My OS: Ubuntu 16.04 standard desktop installation, fully updated

How to replicate:

Lock screen
Put something heavy like headphones on keyboard and leave for the night