Congratulations on your new Newmar, Nj1963.
In your transfer switch check for some loose wiring under screws for power leads from your Gen, load center and shore line.
The load center lines in transfer switch would be common to all outlets into your coach.
Some of your 110 outlets maybe wired off your inverter so you will have power off batteries.
The wiring over time can become loose by vibration and some of the wiring is stranded cabling and load center wiring maybe twisted #12 romex for feeds.
If you do find some screws loose you will save yourself trouble later from high resistance connection heating up and burning wire insulation and other possible problems.
Its a good idea to check all wiring connections in switch and load centers during annual inspections.
Have your power off when checking and be careful not to short out circuit board in TS.