New Card Visual not Working

I have the same issue. If a reference label value is blank, then the card does not update. E.g. I have a slicer, where I choose what item to show on the card. If I choose an item in the slicer where one of the reference label values is blank, then nothing on the card updates. If I choose an item, where all the reference label values return a valid value, then all is fine. The link that points to a known issue does not address this issue (and the issue in the link is said to be fixed already).

Thanks Anonymous for the tip. I'll have to add the coalesce if this doesn't get fixed before I need to publish my report.