Maybe it's a bug with the Realistic Engine Overhaul

I am not sure if this is a bug in the game itself or a bug in this Mod. But it's really annoying.
After I started a launch, the game performed very normally without any problems for a long time. But as long as it takes enough time (probably a few days in the game), the engine will not be able to find the fuel tank. This happened suddenly and couldn't even be detected at first.
So I clicked on "SAVE&EXIT" and re entered,It has indeed returned to normal.
It's very annoying.