Subject line of "New Message" while texting.
I have an iphone 5c that's about 2 years old now. Yesterday, the people in a group chat I am in have complained of my texts coming with a subject line of "Subject: New Message". IT IS ONLY OCCURRING IN THIS ONE GROUP CHAT. None of these people have gotten new phones in over a year, and this group chat has been ongoing since I first purchased my phone. One person in the chat has an android phone so I tried creating a group chat with the other two people in this affected group who have apple products and the subject line still appeared. It's only when I am in a group chat made up of these 3 specific individuals.
I have deleted and recreated the group chat, turned on and off my phone, held down both the home and power button to do a reset, and I have no clue what else to do to fix this problem. IN SETTINGS THE SUBJECT FIELD IS OFF UNDER MESSAGES AND HAS NEVER BEEN ON.
Please does anyone have a solution?
iPhone 5c, iOS 7.1.2