While trying to set up an encounter with a space station I noticed in map view that the station was not moving through its orbit at all. I switched to the tracking center and it was still not moving despite my other stuff orbiting as you would expect. Switching to the bugged craft resolves the issue and it was gone when I switched away from it to the original ship. I am not quite sure yet how to reproduce this bug consistently
I have had this bug too, I thought maybe adding RCS thrusters would help counter it but it only made it 100x worse. It makes space station construction way more difficult than it should be
Rockets that use the cargo bay or cargo nose pieces tend to flip backwards due to the extreme amount of drag they produce. You can easily tell the difference when replacing the problem parts with an equal sized fairing or resizable tube and normal nose cone. This makes rockets with these parts virtually unusable as it takes an insane amount of control authority to override the tendency for the high drag parts to flip the ship backwards. This is most easily reproduced by creating a rocket with a high TWR and the cargo bay parts at the top