Object rotations are inverted after their animation track is removed from Timeline

2. How we can reproduce it using the example you attached

1) Open attached project and scene Test
2) Drag Directional Light onto the Main Cameras timeline and add "Animation Track"
3) Start recording on Directional Light track and adjust its rotation
4) Remove Directional Light track
5) Select Directional Light object and witness inverted rotation

Reproducible in 2017.1.0b1