Not sure if your refrigerator has the Climate Condensation Feature or whatever it is called, but here is some information about power draws from it. Dometic used to put a switch on the unit where you could turn it off. My understanding now is they are on all the time and you have to disconnect or break the circuit manually to disable it so it doesn't draw power.
I have been going to do the Mod on mine, but dry camp rarely so it hasn't mattered yet.
Anyway, here is the link: Dometic refrig climate control
Maybe it helps, it may not be your issue, but it was my first though on a new camper, that is different from any of your old units.
Like Turbs was saying though, getting an amp meter on it and looking at actual draw readings will be the best way to isolate it.