Problem with impress: Blank secondary screen when changing virtual desktop

Hello, I am working with impress Version: 5.4.4.2 about Trisquel (ubuntu xenial). The problem is this: I have two open presentations on virtual desktop 1 and 2. The presentations are projected on the secondary monitor. When I change the virtual desktop from 1 to 2, if the “Soffice” window is not active, the secondary display is white. As soon as it is activated, the presentation appears. If the window is active, no problem. Is there any way to solve this problem?. In previous versions (ubuntu trusty) there was no such problem. Thank you

I’ve tried version 6.0 and the same thing happens.