Whenever going into a minecart or switching your camera perspective in a minecart to first person, the camera always shifts south.

How to Replicate: Just set up signs with the directions on it get a minecart on a rail sit in it and boom there you go.

PS: I'm pretty sure this affects all platforms as this happens on Windows 10, Nintendo Switch, and Xbox One which are the devices I tested.

Video - https://www.mediafire.com/file/kgxvd8zxoks2yce/Minecart_South_Directional_Bug.mp4/file