Open dialer and select the 3-dotted dash menu on any one of the displayed contacts tiles (assuming you had made previous calls for the tiles to show up). Then select messaging icon to send a text. What happens when you try this?
For me this only works if the contact I'm trying to text (using above method) are already in my sent/received messaging list within the messaging app.
If I delete all my texts within the messaging app and try to text someone using above method I don't get the actual write-interface with keyboard, all I get is my messaging front page.
Can any one try above to confirm?