I'm utilizing the Cards macro with the "Card type set to "Dynamic". Sometimes, when the page loads, it will show 3 blank cards, indicating "Nothing here yet. Check back soon.", and other times it will load cards, but the spacing within the cards is wonky.
The configuration of the macro has a single filter on labels:


I tried searching the forums and Google, but couldn't find any info on this issue.
Here's how it looks depending on how the page loads.
Cards with no data:

Cards with data, but wonky spacing:

EDIT:
So it appears to be displaying cards more consistently now. I'm assuming maybe it needed to cache the data. Seems a bit crazy to have to wait several hours to confirm that what you're creating actually displays the way you want...
Anyway, now that the cards are rendering, the next thing that we noticed was that the formatting from the pages where the cards are pulling data is stripped down. This changes the look & feel of the content. The formatting should persist to the cards, even if that means less content fits in the cards. Maybe this could be an option in cases where it doesn't matter as much.