open-sip-connector error logs

Hi, I am using osmo-sip-connector 1.20161024 with osmocom-nitb 0.15.1.20161024 on debian jessie. I keep getting the below error[1] causing my syslog to fill up. Also I can see sometimes the sip connector replies with 0.0.0.0 RTP IP address. Anyone had this issues before ? Any idea what might be causing this? Regards, Stefan [1] Oct 25 11:58:28 openbsc1 osmo-sip-connector[283]: length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettport(0x1064c30): zero length packettpor