Running out of propane most often happens when the grill is loaded & you’re a bit too loaded to drive down & get it refilled. When you shook it earlier it seemed fullish. It wasn’t. You’ would have known that if you had the Truma Levelcheck. It uses X-ray vision (ultrasound) to look inside your propane tank so you always know if you’ve got enough.
Truma Propane Tank LevelCheck