On WIndows, since 3.1.7 if we shrink the OpenLP window below some size (with all the panels active) then it crashes.
Also if it crashes and has run PowerPoint then we have to kill Powerpoint via Task Manager (or reboot) before we can use it again.
This does not happen on my Debian Linux version of 3.1.7 - which simply refused to shrink below a certain size.
Unfortunately the system we use at church is the WIndows one.
Our more experienced AV people know to simply avoid doing this during a live service, but we are keen to recruit more people and it would be good to avoid any problems as they are quite visible and deter people from joining the team (even if problems are very rare).