Good to hear that it works.

I think that's a "feature" of the "SmartStatus+ Music and Volume" watch app that's supposed to only show the title and artist while playing and show the upcoming reminder when paused. Hence, it toggles pause/play when switching "views".
Unfortunately, it may happen that one click is missed so that one has to press more often and may end up with music playing in the reminder view and music paused in the track+artist view.

Right now, I don't care much about the reminder view (It's not working anyhow, right now.) so for pausing I press the middle button until it really pauses.
For starting the playback, I only press the middle button when the reminder view is shown for switching back to the artist+title view.
If the artist+title view is shown already, I use the top or bottom button for previous/next as this also resumes the playback.
Rationale is, that, in this case, I actually want that the artist+track view is shown.