Rigidbody2D interpolation mode causes incorrect transform rotations (Bug 829769).

So I decided to give the 5.5 beta a go and I've found some inconsistencies when rotating a transform with a Rigidbody2D on any axis other than the Z axis.

Normally when I set a transform's localRotation it applies the rotation to the object but if the Rigidbody2D has it's interpolation mode set to Interpolate then neither the X or Y axis will apply the correct rotation. The outcome is a seemingly random rotation between the starting rotation and the rotation that was applied. This problem does not appear to affect the Z axis or the other two interpolation modes, None and Extrapolate.

I also tried this test in a previous version of Unity (5.3.6f1) to see if this was new to the 5.5 beta but it appears to also occur there as well.

I assume this is a bug since the other modes do not cause this problem but i wanted to post it in case it wasn't.