I'm using VLC 2.2.2 on Ubuntu 16.04 (the latest version available in the Ubuntu repositories). The problem I have is that sometimes (with some videos) I am unable to double-click the VLC window (to toggle between full-screen/windowed mode). The mouse pointer completely disappears when I hover above the VLC window. The happens quite frequently, but not for every video I watch. It also doesn't happen immediately - when I first open a video file in VLC, I can double-click the window to make it full-screen, and vice versa. However, at some point, this functionality stops working (and the mouse pointer becomes invisible when hovering above the VLC window). The right-click context menu still works though (so when in full-screen mode, I can right-click on the VLC window (although I have to guess where the mouse pointer is) and then select "Leave Full-screen").
I have tried searching for posts about this issue, but couldn't find anything (the results turn up posts about people having issues with double-clicking video files and having them open automatically in VLC).
Is this a known issue? If so, is there any way to fix it?