This has happened to me before with other aircraft at percentages around the low 20s, but never at 72%. That was a first just yesterday flying a Beaver after 40 minutes or so. I don’t think it was a mixture issue or anything like that because after the problem became recurrent in the past, I ended up binding the refuel action to a button. As soon as the tanks are full again, the engines spring back to life.
However it’s getting to a point where I just don’t know if I can make it to any destination without refueling artificially mid flight to avoid this mystery problem. If it doesn’t sound like a bug, I’d love to know what I might be doing wrong.