Here is how you can reproduce this:
Draw an object (a simple rectangle will suffice). Animate it with Grow and Shrink - 50% and then again Grow and Shrink 100%. The expected behavior was for the object to shrink tho half of its size then go back to the original size. But it goes back to a larger size for some reason. For the 2nd part (Grow) I tried other combinations, for example: 101% is a lot bigger than the original size and 99% is smaller than the 50% (which I assume is 99% of the 50% size).
So, how do I get this behavior of shrinking to half of a size and going back to the original one?
I attached a gif showing what I mean.