@dreamsofwings Hi there, sorry to hear you're having trouble. I also see this bug myself sometimes. When I add a little weight to one of the fuel tanks, it then shows all of them. I don't know of the cause but I believe it to be something to do with MSFS currently having no less than 3 different fuel systems, so the sim isn't sure which one is being used at any one time. The same goes for other payloads as a result, with the values changing depending on the condition of other station loads.
If we figure out why this is, we'll either inform Asobo or fix it on the airplanes.