@jukla I have similar issues with my Run. Sometimes it does show the playback time and the pause button works but usually it does not work. I have updated my software to the lastest 3.19.18 but the issue remains. I have an Android phone.
Edit: Found the related post: https://forum.suunto.com/topic/10905/media-controls-not-working/9. It seems that the problem is in the Suunto App side rather than in the watch itself. Force stop the Suunto app and re-open it solves the problem in my case.