Rotation animation keyframes problem

Hello everyone, I'm having an issue with rotation of Image object in Canvas. What i do to reproduce:

• Create an object with Canvas component named CanvasGO, set Render mode to Screen Space - Overlay

• Create a child object with Animator component (AnimatorGO)

• Create a child object of AnimatorGO, add Image component and name ImageGO

• Add animator controller to AnimatorGO

• Create state in Animator controller and add new Animation

Here is how it looks:

Now when I try to animate an object rotation within z axis, values gets reset in keyframes. Curves graph shows proper values but rotation in frames is not set and object does not animate rotation at all:

Some additional information:

• Translation animation does work properly, same scaling

• Rotation works on 3d objects

• Issue showed up in the newest version of Unity (5.3.0f4)

• Animations created in previous versions of Unity do work in current

• I did try animating parent object (AnimatorGO) - same problem

Did anyone faced this issue? Can you share some tips how to make it work?