Reproduction steps:
1. Open the attached project "New Unity Project 1.zip";
2. Open the included "scene.unity";
3. Enter a play mode and let the animation play until its reverted.
4. Compare the first 16 section and the same section after the reversion.

Expected results: State, Time, Head position should remain the same after the reversion.
Actual results: the head position is reverted to another point than before.

Reproduced on: 5.6.4p3, 2017.1.2p4, 2017.3.0p1, 2018.1.0b2, 2018.2.0a1.