Fixed height value (e.g. 100%) within groups works only when it's smaller than the group

[sebastian-tapwork]

Hi, I'm having this issue since I'm using Fluid (thats a ling time ;) I want to give a rectangle which works as a background or container a height of 100% of the group. When the group becomes larger it works. The rectangle adapts to the increasing size of the group. When the group becomes smaller it doesn't do anything. But when I decrease the rectangle to a smaller size than the group it works. See attached gif. A fix of that would be so nice! Thank you

[matt-curtis]

Yikes. Do you have a sample document?

[sebastian-tapwork]

yes. I attached it. the sample is behaving even more weird. something is definitely wrong with the height...
fluid height bug example.zip