Player rotates immediately

Hey guys, every time when I press play in Unity, my player rotates immediately for no reason. Does someone know how I can fix that?

Sounds like you’re using a rigidbody which means your character controller is interacting with the world via the physics system which is probably why it’s rotating on its own.

Now when I start the game and press a key, the player rotates, but when I press the same key again, the player stops rotating and moves like normal. Do you know why?

Thank you very much for the answer!
How do I can fix that?