Why is LO Base covering my panels in Ubuntu 16.04.4 Flashback?

As I have noted in the Title, I am running Ubuntu 16.04.4 with Gnome Flashback. I have LibreOffice 5.1.6.2. I use LO Base to provide a front end to my MySQL data bases. I’m not sure when this started (i.e., what version of LO, but I know it did not occur in the early releases of Ubuntu such as 16.04.1, 16.04.2, 16.04.3), but when I go into a Base form, LO covers my 2 panels. If I press Help, the panels reappear when the help screen appears. This is an annoying issue. I know this may be an Ubuntu issue, but I thought I’d post this on both forums just in case someone has some thoughts on how to correct this.