Access log stream?title=unknown

Read 2156 times
Hi
Our "Access Log" is not always associating songs with a listener connection, the majority of listings look like this...
eg. 34.xxx.125.xxx 2017-08-24 16:12:58 /stream?title=Unknown 200 NSPlayer%2F4.1.0.3856 65536 0 0

The "Error Log" is working fine recording title changes as expected and song titles are being displayed correctly by media players.
We've only been signed up since July and I can't see a reason why this should be happening.
Any suggestions anyone?

Thanks
Bill