To reproduce:
1) Open attached project and scene
2) Play it
3) Click Change State to double the size of cube
4) Click Toggle Over Time
5) Notice that it only turns off after a short delay (it first gets back to original size in an instant instead of animation, and then turn off)
6) Click it again - the cube reappears the original size as in step 2
7) Click "Change State" a few times until it is again 2x the original size (should require three clicks - it will first get smaller, and then return back to original and 2x size)
8) Click Toggle On - notice it disappears instantly unlike Toggle Over Time
9) Toggle On again

Expected: The state of cube is reset again as it is toggled back on and you can "Change State" as originally (0.5x size - normal size - 2x size)
Actual: The cube returns in 2x size instead of the original state. Afterwards, the cube is stuck between two states - when you click "Change State" the following can happen instead of default animation -
a) Cube doesn't change at all (stays in 2x)
b) Cube shifts from 2x to 1x
c) Cube shifts from 1x to 2x
d) Cube instantly scales into 1x and then gets resized into 2x

Reproduced in 2017.1.0f3, 2017.3.0f1, 2018.1.0a7