problems with chaptered .m4a files ?

[Martin]

Dear all,

minim server is working fine for me.
My setup so far:

iMac, OsX (latest), minim server, WLAN and on the audio side it is a 'Raumfeld Connector' which is connected to the stereo. So playing and songs is via iOS - application from Raumfeld...
It works.

Except for some files. They all are longer (>1h and do contain chapters) and are .m4a files....
Like this:

http://www.audiogeschmeide.de/podlove/fi...t/AG17.m4a

Does anyone have an idea how to solve this issue? Could someone more experienced try to play it with minim server? I'm not sure if it is a problem on the IT (iMac, OS X, minim server) side or on the audio (Raumfeld Connector) side?
Neither do I have a proper idea of how to debug this kind of 'error'.

Any idea or hint is warmly welcome. Besides this I do wish you all a very nice christmas and a happy new year 2016.

KR, Martin