Softphone V14 NAT/ALG error on local LAN

[matrixdesert]

Hi everyone!

I'm facing a problem with my softphone registered via invite mail to my 3cx.
When dialing a number after starting the Softphone everything is smooth.

When dialing a number again (second call) the call fails.
*************
REQUEST 'INVITE' - some of SIP/SDP headers may contain inconsistent information or modified by intermediate hop
SIP contact header is not equal to the SIP packet source(IPort):
Contact address:192.168.0.232:49310
Received from :192.168.0.232:49315
*************
The PC with the Softphone is on the same LAN (IP/subnet) with the 3CX PBX.
No NAT/Firewall or something else in between. Why is the port changing!?

Im running 3cx V14 SP3 Build 49169.513 with Softphone V14.0.49169.0.

Any hints!?
Thx!

 

[NickD_3CX]

The log you copy-pasted might not necessarily be related, I would first recommend checking this:
http://www.3cx.com/forums/post179367.html