[OpenSIPS-Users] TO header of ACK being Mangled!

[Gary Nyquist]

Hello,
I am using opensips 1.10.0-tls (x86_64/linux)

The ACK for 200 OK (INVITE) reaches OpenSIPS with "TO Header" as shown below:
To: <sip:+12313925695 at 54.84.190.24>;tag=317502E0-535A8FD70008B114-90183700
But... OpenSIPS sends out the ACK with "TO Header" mangled as shown below:
To: <sip:10?;>=?716N94.84.190.24>;tag=317502E0-535A8FD70008B114-90183700
There is nothing in the opensips.cfg to alter the TO Header of ACK.
Can some one guess what could be wrong?
Best
Gary
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