Properties are not shared with children

[Vagab]

After talking with @joeldrapper it seems that this is actually an issue. The issue is this, property defined on a parent is not defined on a child. Here's a screenshot to demonstrate this:

it seems like a good idea to share those.
I'll try to come up with a solution but so far I have no idea

StableLiteral on the screenshot is just literal 1.0

upd: I think I found the culprit. Only happens with Data: