QUESTION pjproject Header with no vptr encountered! / Ubuntu 18.04

[Hometech]

Hi I am seeing this error in my asterisk Log after installing Google Voice. I can make and receive GV calls with out a problem.

Just see these error filling my log every 2 or so min. What should I check?

[2018-09-30 16:57:20] ERROR[1267] pjproject: sip_msg Header with no vptr encountered!! Current buffer: OPTIONS sipbihai.sip.google.com SIP/2.0