How to reproduce:
1. Open attached Unity project "AnimationPreview 2018.1"
2. Select Humasn_EnableRootMotion in the Hierarchy window
3. Notice position in the Inspector window
4. Play animation in the Animation window
5. Notice position in the Inspector window

Expected Result: Position of the object is the same as before playing animation.
Actual Result: Position of the object resets to 0.

Reproducible with: 2018.1.0b2.
Not reproducible with: 2017.3.0p1, 2017.2.1p2, 2017.1.3f1, 5.6.5f1, 5.5.6f1.

Note: Animation is working properly while game is running.