Yesterday I had 100% Fullscreen and today it's not anymore. Happening time and again. (Screenshot available)

This is Ubuntu 18.10. I have installed the latest version of LibreOffice through “snap”.

And all of the sudden today I am still seeing notches, bars etc.

This is yesterday’s state when things were fine.

This is today’s state where things are little weird

My Question is: What’s wrong with Libre? Why it is acting so weird day to day?

So do you have two LibreOffice installations on your system now - one from the PPA, and another from snap? if so, have you checked which one are you using at the moment?

no, I have only one now. Snap. No PPA. PPA is not updated to So.
(Update: I had to go somewhere and I shut down my computer. And then I restart, now its again. Now I got 100% Fullscreen again. I wonder when this will be going to be permanent fullscreen.)