Toolbar is not working properly

I have turned on compact mode, so i have to hover to the left side to access it. I usually go to the left side, it appears and i do what i wanna do. But today, when i go to the left side it appears as usual but automatically disappears again without me doing anything. Also if i click on something on the toolbar it does not register but it clicks on whatever website that is underneath it. It doesn't happen all time though, sometimes its working like before. I don't know how to find the exact cause.