Platform: iOS
Tablet: iPad Mini 2 Retina
Version: iOS 9.3 (latest)
Problems:
1. Everytime you pull up the keyboard to type and retract it, it'll send a blank message (Example: "VoidRuler: ") even if you don't actually send anything.
2. Messages overlap eachother
3. Occasionally, users will appear to switch usernames
Could also be Android bugs, but I'm using iOS. Would test on Android via Bluestacks but it's too much of a hassle.