My Freeswitch server is flooding with video refresh INFO method like this:

INFO sip:aaaa@x.x.x.x:61838;transport=tls SIP/2.0.
Via: SIP/2.0/UDP x.x.x.x;rport;branch=z9hG4bKKr3U2HQyU08yc.
Route: <sip:x.x.x.x;lr>.
Route: <sip:x.x.x.x;r2=on;lr>.
Route: <sip:x.x.x.x:5061;transport=tls;r2=on;lr>.
Max-Forwards: 70.
From: "aaaa" <sip:aaaa@voip.net>;tag=3UcX6HB3Q98ZK.
To: <sip:bbb@voip.net>;tag=626GIwP.
Call-ID: 0f55526d-b886-1234-e784-040185d50001.
CSeq: 93270262 INFO.
Contact: <sip:mod_sofia@x.x.x.x:5060>.
User-Agent: FreeSWITCH-mod_sofia/1.6.7+git~20160401T134007Z~f0c3870be3~64bit.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, path, replaces.
Content-Type: application/media_control+xml.
Content-Length: 149.
.
<?xml version="1.0" encoding="utf-8" ?>
<media_control><vc_primitive><to_encoder><picture_fast_update /></to_encoder></vc_primitive></media_control>