Hot water heater excessively heating RV siding

Relatively new Escape fiberglass RV trailer has water heater heating the fiberglass siding too hot to touch.  Some other owner have same issue.  Others don't.  Escape seems unconcerned!  At one time they included a vent shield over door,  Now don't.  Anyone familiar with this issue?  Seems dangerous.  Installation looks correct (Suburban heater).