Apple watch -- music in workout app

I am using the watch, without the phone (I do not bring the phone on my runs). I use the "open run" and start my run, swipe right I get the pause, stop, etc. When I swipe left I get the music control screen. However, the <<, >>, pause/play do not function. I cannot get the tracks skip forward or backward, pause/play. To perform these functions I have to leave the workout app and go to the music app, where they function properly.

Any ideas on what could be causing this issue?