I have similar issue. Look at sip authentication in bye message. Thing in your case Auth header not present.
Hello )_________________________________________________________________________2nd day fighting with issue, not able to find it's source.We developed 2 SIP apps - for Android and IOS (using PJSIP)For Android all fine :)For IOS - when remote party hangs up - FS does not send BYE message.There must be something I'm missing, when doing either INVIE or else - but I can't find any serious difference between Android and IOS invites.Maybe someone have a clue, how it's possible to ask FS to not send BYE?
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