Super Hot Propane tank when traveling

I think camper dave hit the nail on the head. Had the same problem with my 1989 Ford E350. The catalytic converter had fallen apart and was plugged so it got super hot to a point where the paint around the exhaust pipe exit area blistered. Heard ticking also which was the extreme heat up of the converter. At a rv park I sprayed the propane tank and it produced a bunch of steam. I think the original problem was one or both oxygen sensors was faulty and affecting the converter. No I don't think you're imagining that the propane tank is getting too hot.