This is what happened to my iOS install. Due to some problem (is it an exploit hidden somewhere among incoming messages?) my Messages app opens for 5+ seconds e

This is what happened to my iOS install. Due to some problem (is it an exploit hidden somewhere among incoming messages?) my Messages app opens for 5+ seconds every time, and there is absolutely nothing I can do, except setting up a whole new iPhone from scratch (and hoping the problematic message win't get synced from iCloud anyway). On rooted Android I could clear corrupted app data.