Steps to reproduce:
1. Open attached project
2. Select "Plane" object from the Hierarchy
3. In Timeline window add Animation Track and select Plane's Animator for it
4. Start recording an animation which animates Plane's Scale from (1, 0, 0) to (0.1, 0, 0) and Position from (0, 0, 0) to (-4.5, 0, 0)
5. Slide the Playhead back to keyframe 0 and to the lest keyframe multiple times

Expected result: Plane is moving between the set values
Actual result: Plane's position at the keyframe is different than what was set

Reproducible: 2018.3.0a4, 2018.3.0a11
Not reproducible: 2017.4.10f1, 2018.2.6f1, 2018.3.0a3