18.1 latest beta, bug I noticed. 15 Plus. CarPlay.
Said "Read new messages."
Read the first message. Asked if I wanted to read the second message (different thread)
I said yes.
It asked me if I wanted to REPLY to the second message.
I said 'Cancel'
It then read the message from the second sender.
This bug happened early in 18.0 betas as well, but was fixed later on (at least in my experience)
If this is the wrong place to post things I this, I apologize.
Mike.