Notifications of new messages very rarely show up. Messages are also often not received by the recipient. I have tested this out with multiple friends, like 10% of the messages that we send are never received by the other person even though the messages say they have been delivered. We also have group chats where some people receive the messages while others never have them show up. Very very frustrating, I had so much hope for this app but these issues have been going on for over a year.