iMessage Read Receipts Disappearing
This issue has been going on since the first iOS 9.3 beta and continues even on iOS 9.3.1. When someone has read receipts on, I can see when they have read my message. However, if I lock my phone, close the messages app, or just wait a couple minutes, then the indicator changes back to "Delivered" and the read receipt moves up to my previous message even if they have already replied to my latest message. I have tried turning off iMessage and resetting network settings then turning iMessage back on. I have even reset my phone and set it up as a new phone in case a backup could be the problem. I have the same problem for all of my messages.
iPhone 6s, iOS 9.3.1