Unable to add Animation key in the frame by changing the position of the game object in the scene.
It resets the changed key value to the initial key value.

Steps to repro:
1. Create a new project.
2. GameObject > 3D > Cube.
3. Windows > Animation > Animation.
4. Create a new Animation clip > Click on the Record button.
5. Add a key to the frame by changing the Cube position.

Actual Result:
Unable to add Animation key in the frame by changing the Cube position.

Expected Result:
Animation key should be added on changing cube position.

NOTE: It is occurring with Position and Scale property.

Reproducible in:
2020.1.0a9, 2020.1.0a8.

Working Fine:
2020.1.0a7, 2019.3.0b7.

Environment:
Windows 10 & Mac 10.14.