Comment 25 for bug 1872268

I have this same problem. I made a video with the problem and the solution here:

https://www.youtube.com/watch?v=J3N9lnGMj-8

The bug is caused by the Ubuntu Dock extension. Changing the extension for the dock to not occupy the entire height of the screen solved the problem.

What I did to resolve it was:

1 - Install dconf

    sudo apt install dconf-editor

2 - Go to /org/gnome/shell/extensions/dash-to-dock/extend-height

3 - Deselect the "Use default value". And set "Custom value" to "False".