After flying in XP11 PB17 for approximately 10 minutes, I get a black screen in the simulator. The FlyInside menus are still visible, sound still works, but there is graphics from the sim. I can tell the sim is still responding to inputs from my joystick based on sound. I can also bring up the XP11 Menus on my PC Monitor, but can't recover the simulator graphics.
If it's relevant, this is happening using the Carenado C208 Grand Caravan. I have not had an issue with other aircraft but have not used them in this version of the PB.