I don't care if Edison actually said this. They should accredit the image to Nikola Tesla.

Yep. Rogue One and Andor are my favorite stories since the original trilogy. The writing and dialogue are so good. No cheesy one liners or fart jokes, it's a sharp espionage thriller.

This was my thinking as well. If OP does not know how to replace a toilet, now is a good time to learn.

Our local Habitat for Humanity ReStore often has new toilets in the box for under $100.

When you say "the circuit loses power", do you mean it trips in the breaker box?

The GFCI will only trip things "downstream" if they are connected to the "load" terminals on the back of the GFCI. If they are in parallel, the GFCI will not trip anything other than it's own outlets.

Is the refrigerator on the GFCI? It would not surprise me if the refrigerator didn't trip the GFCI when it was young, but as it got old the compressor kicking on started to draw more current (to overcome more friction as parts age).

Regardless of all that, I would probably address the Reversed Hot/Neutral issue first.

I am not a plumber but I did get a new sink and reinstalled my dishwasher with a new water line, P-trap, disposal, and high loop. Haven't had any issues.