I got this problem with my animation. As soon as i start playing my “game”, i find the character flipping from the editor position to another position.
I have figured out that the problem has with my animation to do. but i dont know whats up…
Do you have a rigid body component attached to the character? If so, you can try disabling the effect on rotations and see if that helps or check what forces are being applied to it.
You can also try parenting your character to an empty game object in Unity or a locator in your content creation application.
Can you post a screen shot or video of the actual problem to clarify?