I made changes in my first post because I was wrong about the behavior with the setup « iOs + Linux + audio transcodage OFF »
In fact it won't display any error message but it will play fine for 3 sec and then it jumps to the next track which is a web radio too, so it'll play 3 secs, then jumps to next track etc... etc...
The bad thing for me is I can't stream web radio, because of my usual setup "JRiver Linux + JRemote iOs". No matter transcoding is on (error message) or off (track switching).
Can I hope you check this and fix it?
If needed my setup infos are:
Server => Debian Jessie with JRiver 21.0.88
Remote => iPhone 5c iOs 9.3.2 with JRemote 3.22