Windows 10 here.
It happens to me too, usually when I start my computer in the morning.
It seems to me (I'm not sure) that the blank screen I get is the default Electron window : for example, the File menu has only one option (Quit) and i don't see other menus like "Notes" or "Go".
And the only way to quit is by using the Windows Task Manager.
After that, Joplin starts as expected.