Might have found a bug. If you play a mood and change to another mood that includes the same element, the element in question stops playing when it reaches its end.
Example:
I have a musical element in one of my moods. It’s 2 minutes long. After 1 minute I change to another mood. This new mood also includes the same musical element, so it continues playback of that element (as designed I guess), to play it from the point where I changed moods. When it reaches it’s end it seems as if the online player has forgotten that it was initialized (this happened in another mood) and it stops playing.