Okay,
To recap, im not a novice i've been on these forums since my S3! 
Moving on..
Before when I had marshmallow when ever I listened to streaming music ORSaved mp3 collection on my SD card. I could be driving down the road and listening to my music then a text would come in and I would push the MIC button on the samsung keyboard and it would always pause while I dictated, then resume playing or streaming!
https://www.youtube.com/watch?v=X95qtx1vPMI This is my video to show what I mean.
Since this new nougat update, Plain and Simply.... I CANT! Not just Bluetooth, the phone speaker too!
I use Spotify and Poweramp to listen or stream.
Using the process of elimination i tried the following...
1) Complete Factory Reset. 
2) Changing and resetting permissions to the keyboard app and the music apps.
3) Installing a different keyboard app ( Swiftkeyboard )
4) Safe mode reboot and test..failed.
5) Wiping the CACHE partition.
6) Clearing Data on Samsung Keyboard App.
GET THIS!
If using the Google Assistant to dictate, the permissions grant it to pause any app that is outputting sound.
I've called verizon, They have no idea and reffered me to Bestbuy's samsung expert.
The guy I got reffered me to an app! Samsung+ but he himself had no idea...
I've Tried Samsung+ Live tech support.. They are escalating it!
HELP IF YOU CAN!
