T23G - No RTCP-XR data being generated

Hi,

We have T23G's, running on firmware V80 - UK 44.80.23.5, and the phone(s) are not producing any RTCP-XR data. All the options are enabled in the phones themselves, but the phone doesn't generate any data. See example below..

Start Time 2016-4-1 13:48:50 Stop Time 2016-4-1 13:48:50
Local user 2002 Remote user 2001
Local IP 87.127.xxx.xxx Remote IP 87.127.xxx.xxx
Local Port 10000 Remote Port 17192
Local codec G722 Remote codec G722
Jitter 0 JitterBufferMax 0
Packets Lost 0 NetworkPacketLossRate 0.000000
MOS-LQ 0.000000 MOS-CQ 0.000000
RoundTripDelay 0 EndSystemDelay 0
SymmOneWayDelay 0 InterarrivalJitter 0

The setting under Settings->Voice Monitoring VQ RTCP-XR Session Report is enabled, and VQ RTCP-XR Interval Report is also enabled.

Anyone have any ideas why this may be occurring?