That "Barbarian" missing text was a false alarm, sorry. It's actually an old text, months old. When I switched to this new messaging app, I imported my old messages into the new app. A while later, the new app noticed the imported messages and showed me a notification. I saw the message in the notification, but was confused when I didn't see it in my list of recent messages, and assumed I'd deleted it. But really the reason it wasn't in my list of recent messages was that it was months old, buried under newer messages. Yay, modern phones are amazing.