We are using a custom freeswitch SIP server to handle calls using SIP-TLS and SRTP for media encryption. The linphone application was always working fine with our configuration both on desktop version, android version and IOS version.
Since the last iphone update, the pick up button on the application doesn't work anymore, the call window appears but the call time value stays at 00:00 and the freeswitch server doesn't receive any SIP trace from the phone. The outcoming calls from the IOS application are working as expected.
We can try to send any debug information needed.
The desktop and android version is still working fine, both for incoming/outcoming calls.
Thank you for your support.