Happy to look at the problem and fix it if possible.This feature should work as there are two parallel faces. Can you attach a video here, where you recreate the problem?
I’m so happy you guys are on the ball, but I’m positive that our inputs are capital enough for you to improve your product, please excuse.
My job is not to build your product, but the free use version is a way for us to co-improve YOUR product.
Appreciations to your way of communicating with us!
I finally figured it out!
When the cube/object is still in contact with the initial sketch the value does not appear. Unless it is outside of, in this case 1500mm from, the value does not show on the face which is in contact with the sketch. If I Hide the sketch it works fine, at least in this simple example. Interesting! What to do?
Yep - when you have a sketch on a split face, it will be an Extrude, thus the height shown will be Extrude’s.
Glad it worked out 
As for your last post, I think the sketch is
a) on another other side, and the one that you have selected has no sketches on
b) doesn’t split the face into two closed “parts” so it will remain an Offset