Why Animation clip moving character in scene?

Hi
I make custom rig in blender and some simple animation for testing.
Then i imported animation clip in Unity and set up Animator and Animator Controller for testing.
After starting game mode i see how my animation is work, but character start moving in Y axis (moves endlessly in this direction).

In blender all fine - character stay in place.
I find some solution - in import settings i can "Bake root position into pose", BUT previous times all animation works fine without baking position.
Maybe i missed some setting in blender... Help me pls