An element set to stretch, but doesn't take up space

I have an element that is set to stretch, but it doesn’t take up the available space
DEMO VIDEO

@yang Unfortunately this is still an issue. Can’t manage to set the height.

wether I set ot to hug-content or strech → no visible change

note that it’s overflowing the parent, which is currently set like this

I have resolved this issue.
And you can observe me doing so, as well as many other issues, in this video:
VIDEO: Plasmic - working on the AudioItem

It is very long, but I figured you might learn something from it.

Here is a new issue in the same component about me not understanding why the size of an image is changing:
VIDEO: The size of an image seems changes unexpectantly