I agree it should not have anything to do with the ground fault 120 volt side of the system.
I was not paying attention to the actual devices that were not working.
However I would suggest to anyone that it is a good idea to unplug your trailer from AC (and DC if you like) then remove the front cover of the fuse panel and carefully tighten all the screws where the wires attach on both the DC and AC side.
Also check the ground lug on the rear of the panel where all the wires attach. For that matter all the connections in the area you can see.
I know a few have found the screws not as secure over time and this is a good place to start solving your problem. The fuse could be ok but the wire may not be making the best connection right beside it resulting in the...but working today situation.