John Gruber notices that smart punctuation was mysteriously working then not working in iOS 11 iMessage:
But if I’m right about why, then why does it apply to iMessage messages — a.k.a. blue-bubble messages — too? iMessage messages aren’t limited by the antiquated constraints of SMS in any other way, so why limit them typographically?
As Gruber notes, SMS messages are out of the question, but considering that the last 2 iMessage text crashing problems have been CoreText crimes, this smells like yet another.
One reader tweeted that Apple needs to fuzz the hell out of CoreText but I think that is a dead-end that will just go on forever. A CoreText reboot is the better long-term solution and use of limited engineering resources.