We have a 2022 and when I see something like your situation, my brain goes to "Inverter Breaker". We have the 3 Lithonics batteries and 3000 Xantrex Inverter.
We spent the night at Oliver after pick-up and plugged in. The next afternoon we packed up and moved to David Crockett State Park and plugged in. That evening I opened the Lithonics app only to find my batteries down to 73%. Shore power wasn't charging the batteries. I reached out to Oliver and Mike sent me a picture of the breaker. He stayed on the phone and walked me through checking the breaker, which was tripped and resetting the breaker. All was good for 2 months and it happened twice more. Oliver sent me a new breaker. In October 2024 we were boondocking, turned on the inverter to cook oatmeal, and 30 seconds in the microwave shut off. Jason was at the Texas Rally and ran tests. In February 2025, during service, it was determined that the issue was the breaker. Since they were no longer using the breaker and didn't have any, we lived with things until we got home. We were plugged in for the trip, so really was not inconvenienced. I order two new ones. I followed the shut down procedures, solar off, inverter breaker off, then each battery. Start up is reversed.
I discovered to my horror that problem was very loose connects, resulting in pitting of the cable ends. Arching was obviously occuring. I replaced the breaker and now will check the connections each fall after our last trip.
While your breaker might not be the issue, I would really check it over. Just make sure you completely power down per the sequence mentioned in this post.
Good Luck. Please provide an update.
During this period we experience a few weird things, which we attributed to the loose connectors.
I suggest you send a service ticket request to Oliver so they can provide input.
support@olivertraveltrailers.com