If you didn't make any changes to the system after the blowing a fuse incident, kinda makes me wonder if something else didn't trip, blow, come loose, or fry when that happened. I say this because I basically have the same meter, and seen this happen several weeks ago.
When I recently re did my own setup, the layout was quite a bit different than the former, and I had several brain farts while re wiring it. I accidentally connected my negative output from my solar charge controller (SCC) directly to my new negative master battery buss bar - before the shunt, and my solar input was no longer seen.
Completely different set of circumstances here, and mine was an easy fix. Not sure if my input will be helpful to your troubleshooting, IDK.
Edit -
@Chevchick , Thought I'd mention that my monitor looks identical, and functions identically, but it isn't a Renogy branded meter. I may have bought mine before Renogy got their hands on the legalities and/or marketing of this particular meter.
I've never had a single hiccup from my meter over a period of several years. I just read a bunch of reviews on Amazon regarding the Renogy branded meter, starting with lower reviews first, looking for problems similar to what you are reporting. I didn't read everything, but never seen anything like you are reporting. Their meters certainly do screw up, die prematurely, unexpectedly, etc, on an unknown amount of occasions.
Strange that this happened in the same time frame as the fuse blowing incident. Coincidence? IDK... That's why I thought maybe something like a connection between the SCC and the end connections had came loose, or something like I previously suggested.