I think I found a key snippet of information for figuring out the cause of cities showing they're invaded, but not having a crimson dragon. There are currently 4 cities invaded on Origin. Yew Falsehood Britain Hatred Magincia invaded, but no npcs Moonglow Falsehood Yew and Moonglow do not appear to have a crimson dragon. I paged a GM to see if they can confirm that a crimson dragon exists for either town. Britain and Moonglow both have crimson dragons in them. I think the bug causing 4 cities to get invaded is linked to the bug where cities don't have a crimson dragon.