I noticed the same thing. WT-? I'm guessing/hoping there is just a new way of doing it other than holding down the clipping itself which just seems to show a delete button. I also tried the floating menu "more options" button and this did nothing.
that only brings up the clip board, does not address the issue that you cannot lock text message to clip board as you can on note . a picture of a lock appears over the text message after you long press on message.
I would like to know where the lock Icon went when locking text messages to clip board on Samsung note 4? it was on note 2...I tried long pressing mike but it only brings up clip board does not lock message