iMessage Group suddenly changed to MMS
I am in a large iMessage group. I’ve been in this group for over a year. It has always been iMessage. Someone left the group and all of a sudden I can only respond with MMS. I still receive messages from the group as iMessage but when I reply it will only send as SMS and it starts a new group for everyone else. I’ve tried restarting iMessage, my phone, and turning off SMS messaging.
iPhone 11, iOS 16