While working on my project I already discovered that servicemp3 is doing wrong things with the pipeline.
No prerolling, no prerolled -> play it just play it direct!
And stopping the pipeline is not going to all states, it shuts off directly...
Reworking the whole servicemp3 at once is taking a bit longer but I'll see if I can do a quick correct implement of the preroll and stopping of the pipeline.
My latest patch to prevent crashing of gstreamer 1.0