Volume Control Works fine via the remote i am using, Volume Hardware Keys on the phone, and the volume controls on yatse itself. Also, the options i have turned on via general are
Lock Screen Controls = checked
Show Notification = Checked
Seek in Notification = Checked
Keep Notification = Checked
Also, as a side note, i just ordered and received a Samsung Galaxy watch, that has music player controls. When the watch is paired up to my phone, i am able to see the now playing screen on Yatse, from my watch, just not control it. Again if i try using another app, such as vlc controls work as expected. I assume this might be related. The now playing screen even shows the music, artist, and artwork, just when i click on any of the play/pause controls, or skip, rewind it does nothing. Just as with the remote, it works fine via other apps