This started on the last release. I don't normally work on any program maximized to full screen but I've found that if I do this with InfoQube, it takes over the whole screen and prevents from minimizing the window after that point because the windows symbols in the upper right are gone.
Often it further takes over the screen by wiping out my taskbar on the right side. The only remedy is to close the program. When I re-start it, sometimes it comes up maximized again and I have to re-start it again. Finally, it will come up as a partial window, and I can continue working.
I've tested all my other open programs and none are doing this. I've attached a screenshot of the maximized window. Note that in the upper right the three symbols are missing for "minimize", "maximize" and "close".
Not a big deal, I guess. I just have to remember