update: im pretty sure the phasing doesnt actually happen with the base project, but i can indeed assure the slower platforms do indeed not work
Hello, that is correct. ALL moving objects should not move at speeds below a full integer. This is intentional (and could be considered a design flaw). I have a newer, more complete platforming framework for Unity available on my page that fixes this. If you wish to try it, I can give you a free key if you cannot reach your desired results with this older asset.
Update: I tried to recreate your issue with faster platforms and there was indeed an oversight which I fixed. See version 1.6 on the downloads page. Thanks for the tip!