Yep, gas was in the tank. I had to double-check that day for sure
As far as the sender being a fraudulent part, anything is possible but I doubt it. The reason I doubt it is that mine failed back in 2015 right as the recall on the original senders was announced. My Rogue sat at the dealer for ~25 days because there was a delay in getting the new parts from Nissan. I had a free loaner that whole time, so I doubt the dealer would have covered that cost only to have put in a phony part at the end of that time.
Interestingly, I got the car back from the dealer a few days ago (they still couldn't reproduce the issue). I haven't seen any problems since either - and have been driving it every day. Makes me nervous that it can happen again, but there's no explanation thus far as to why it occurred.
Do you know if the fuel sender is activated only when engine is started? Or does it also activate when you turn on the vehicle accessories to pre-pressurize the line? I had a (possibly ridiculous) theory that maybe I was using the accessory setting the night before when loading up the car, but never started it and maybe the engine got flooded a little overnight or something.