I run with my Cirrus 820 on Auto. When not plugged into power, the next default is propane, then DC. When driving down the freeway at 75mph it usually blows out. The system will then switch to DC. DC doesn’t work very well and drains the batteries even with the 160 W solar panel. On back roads, the propane stays on fine and works very well. I will be going to Puerto Penasco in 2 weeks so I will see how it works in the heat. If you don’t have auto then I wouldn’t run on propane. If it blows out there are 2 problems; First, the fridge isn’t staying cold. then there is the risk of the gas running. Most modern system wouldn’t have that issue. My take anyway.
I’m kinda surprised to hear of it blowing out, I’ve been running two refers (2 way Norcold – no dc) on two different campers since 2005, probably 130k miles or so total and have yet to have a flame go out…I don’t believe your situation sounds normal – JMO