App randomly refuses to start: AalMediaPlayrService

LOG:

[TT 2016-06-04 18:58:23.291774] [service.cpp:29@instance]
Warning: Failed to start a new media-hub player session: org.freedesktop.DBus.Error.ServiceUnknown: The name core.ubuntu.media.Service was not provided by any .service files
Warning: Failed to create a new media player backend. Video playback will not function.

Warning: Could not finish contructing new AalMediaPlayerService instance since m_hubPlayerSession is NULL
[0604/205823:ERROR:layer_tree_host_impl.cc(2218)] Forcing zero-copy tile initialization as worker context is missing

The splash screen shows, but the app does not start.