Josh, I wanted to check in on this so it is not forgotten. I now have a couple more zombie tiles. How they get into that state is one bug which I believe is the one you are more interested in. The fact they can’t be deleted when they get into that state is another bug, that frankly is more impactful as I can’t “redo” it. The latter should be much easier to troubleshoot and is likely to give you a clue as to the former.