2022 Tiffin Open Road, Ford 7.3L V8. Exhaust system too hot

After 6000 miles on new 2022 Class A with Ford 7.3L V8 happened to notice melted wire loom, scorched and heat damaged electrical conduits and scorched aluminum faced insulation mats under coach in area of exhaust pipe and catalytic converter. Very concerned of course. Dealer and factory say motor diagnostics are normal and that "no other similar issues reported with any other Open Roads they know of nationwide." After almost 8 weeks in the shop dealer and factory do not yet know what to do to fix the problem.

Curious if any other Open Road owners or other RVs owners with new 7.3L V8 have seen evidence of scorching or heat damage under the coach especially near the exhaust system. Any info on remedies undertaken would be much appreciated