Not sure if this should be posted under S4, but since its the phone I'm using, I'm posting it here. My S4 is rooted and running on 4.4.2. Over the last few weeks I have noticed a strange glitch specific to the Messenger (standalone FaceBook messaging app). All new messages show up as a notification alert from where I can directly open into the message except for those from one particular user. In this case, when a new message from the user comes in, it shows up like all other messages in the notifications bar, but I am unable to open the message from there. I have to instead open the App, scroll thru the list of inbox messages in there and then open the new message. I have tried clearing cache, re-installing the app, I have also deleted the conversation thread with the said user (we had a conversation thread going back a few years) but it doesn't fix the issue. What's pertinent is, this same user's messages cannot be opened from the messages section on the FB app either while all other messages clicks in the Facebook app message section will automatically redirect the click to the Messenger app and open up from there. Any idea what could be the reason?