Filled fresh water tank, panel gauge reading empty, not finding any leaks

[MichiganLaz]

Hey all! So I'm guessing this is just a sensor issue but want to double-check. I have a 2021 2600RB model and just filled the fresh water tank until it overflowed. Got set up and gauge read 2/3 full. Shortly after that read 1/3, and then today reading empty. Pump is not cycling except when we use water, looked everywhere inside and underneath for any evidence of leaks and finding none. Safe assumption- something wonky with the sensor and/or panel?

Of course I'll find out soon enough if actually, mysteriously losing water somewhere from the tank but sure not finding any evidence of that.

UPDATE: I was able to get a peek at the tank by loosening one of the fastners holding the cover (coroplast?) on and it looks full, and no water sitting on the barrier.. so pretty solid conclusion, it's something with the sensor.

[Jlawles2]

You might want to check the wiring on the side of the tank. Let's just say wiring on tanks is not the most reliable.

Side note, if the water is not conductive or extremely heavy in Minerals it can throw off the sensors. low mineral or ion water will not allow the sensors to detect current where heavy mineral water can leave non conductive deposits on the sensors (back in the old days it was literally stainless screws through the plastic).