Why are the 'normal' and 'notes' views not showing after upgrading to Version: (x64)

This is not consistently reproducible, but happens frequently!
Normal or Notes pages will not show unless outlines or slide sorter tab is clicked on and off a few times… then all is back to normal for 1-30 minutes.

I recently updated to Version: (x64)
Did not happen previous to this. (v5.?)
Sometimes it has odd things showing on the ‘normal’ view when this happens… like in the first pic.

Any ideas? Re-install?

This is tdf#121269, fixed for 6.1.4.