iOS 10 b2 reply from lock screen doesn't allow reply

My iPhone 6S works perfectly fine replying from the lock screen with force touch but my wife's iPhone 6 will no longer let her reply from the lock screen. It doesn't give her the option to reply, just opens the message bubble with no keyboard. Did something get changed? Or is this a potential bug needing to get reported?

Replies

Report it anyway, as it should help. Not had an issue but not had a message to reply, using 6 Plus