Update rate optimizations smoothing out step interpolations

I have animations with step interpolations. Those should teleport from one point to another. In the animation asset this is happening as desired and it is also happening in game when the setting on the skeletal mesh for ‘Update Rate Optimization’ is off. However when Update Rate Optimization is on, it seems to be smoothing out the step interpolation frames, so that there is visible movement between the keyframes. It is not only this cube, but complex animations with lots of bones, so we would like to use Update Rate Optimizations. The animation asset is also set to Step Interpolation.

So I am wondering if it is it possible to have update rate optimization without the smoothing out of Step Interpolation frames.

This is how it looks without Update Rate Optimization (How it is supposed to look like)
StepInterpolationWithoutOptimization

This is with Update Rate Optimization
StepInterpolationWithOptimization

I appreciate any thoughts on this. Let me know if you need more information.