There are some parasitic drains, in most RV's.
There is a control board in both the refridgerator and furnace. These boards draw some power even when the unit is turned off.
There is continuous power going to the CO2 detector.
There is continuous power going to the radio.
Only way to kill these circuits is disconnect the battery.
Maybe, the three circuits indicating a power loss, were the three that I mentioned above.
If your problem is draining the battery while not connected to shore power, that is normal. You need to install a disconnect switch or actually disconnect the battery itself.