"Unused" Property in Component not appearing in Instances

I have a simple card Component, just a photo and text. On our website, these cards link to other pages. So I have given my original Component a URL Property so that my team can see what pages those cards link to. This Property is text and not attached to any visual part of the card.

My issue is that when I create an Instance of this card, the URL Property is not carried over to the new Instanced card. The Property has to be manually re-added, which is very tedious as I have many versions of this card.

Is this behavior intentional or a bug?

@Heather_Smith Perhaps you are copying and editing an overridden instance of your component. Retry and edit your main component, and the edit must appear in all not overridden instances. If it did not, this must be a bug!