I am trying to type in an exact value for the clamp, but whatever value I type into the field doesn't get saved. However, using the slider works just fine. [Here]https://i.gyazo.com/aca2d0afc0343b9ca1294993a576c7e9.mp4[/url] is an example of what I'm talking about.
Did you try by specifying the measure unit? Like typing in "1000 m"?
More often than not (at least in older versions), WM would assume you mean kilometers, when no unit was explicitly expressed. No idea how it works now in version 3, but worth a try.