android cant connect under 4G, only wifi

I have a Samsung Galaxy S5 and with my xiialive app I am able to connect to my webserver and audio stream under a wifi connection, but as soon as I try to connect under a mobile data 4G connection it loads the web server page but that is all, it wont load the audio stream to play in xiialive.
 I believe it might be something with my phone though and not xiialive, has anyone else had this issue?