Bug? Animation hasn't a linear interpolator

[Informatix]

It seems the interpolator by default of the Animation library is not the Linear one. It seems to be "Accelerate-Decelerate". Is it what is expected?

EDIT: I got the same result with various devices and OS. Definitely not linear.

 

[Erel]

It doesn't set the interpolator. The default one will be used.

 

[Informatix]

Thank you. It is not an issue because I can change it with AnimationPlus but I wanted to be sure that it was not a bug on your side.