Space heater trips inverter breaker (R-Pod 195)

The dealer did pull the inverter and take a pic of the 12A breaker.  They seem to be as confused as I am, maybe because this is such a new model and they haven't dealt with many.

I did find this in a Forest River forum.  It pertains to a MH, but may be relevant.  I'm in the process of emailing FR asking if the inverter does in fact power only some of the outlets.

In our MH not all outlets will work, only a few a hooked into the inverter. A simple way to check is turn on the inverter and take a night light and try all the outlets, bet you will find some will work, others will not. Make sure your not hooked up to shore power when you do this. In ours, some in bedroom, entertainment center will work, while ones in kitchen will not.

Since I never turned that inverter switch on while not on shore power I don't know if some outlets would be live.  I only tested them with the switch off...

Under Options in link below (R-Pod 195 Full Specs):

Ours has the solar panel...

Took our new 195 on its maiden voyage over Thanksgiving and immediately tripped something (GFCI?  Breaker?) on 30-Amp shore power using a space heater plugged in to one of the outlets next to the bed.  Ok, my bad, even though the same space heater worked fine in our previous TT, a 2015 T@G.  Had the TV on also, so that must have put it over the limit.

So...every outlet was dead, including the one the refrigerator used (which it turns out was on the GFCI circuit).  Here's the funny part...GFCI not tripped.  The 15 Amp breaker on that circuit not tripped (reset twice anyway just in case).  Pulled the outlet and it looked (and smelled) OK.  All other electric worked, including lights etc. that run off the battery and other 120V circuits (e.g., microwave worked fine).

Upon return took it to the dealer who after checking the usual suspects initially said they'd have to pull the bottom off and find the burned wire or wires.  Then called back an hour later and said that a 12-Amp breaker on the Inverter had tripped, and that was the culprit.

So my question is why would that circuit have anything to do with the inverter?  When not on shore power none of those outlets were live, so my (possibly faulty) assumption was that the circuit was supplied by only 120V power.  The fact that the fridge on that same circuit does not work off 12V battery power by design only strengthened that belief.  One nagging aspect of this is that there is an on/off switch for the inverter above the microwave...maybe when that's on there is power to the outlets supplied from the battery?  I never switched it on.

Thanks for reading through this...I still obviously have a few things to learn about RV power systems despite the reading that I've already done in an effort to fully understand these beasts.