Asterisk don't send re-invite to remote side

I set canreinvite=yes.
I establish SIP call between 2 UA.
One of the UA send re-invite to change the port and get 200 OK from asterisk but asterisk don’t send the re-invite to the remote UA.
Is it a bug? or asterisk don’t handle re-invite when changing only the port.

I use 1.603 version

There have been recent bug reports about failures to re-invite when there are multiple Asterisk boxes in tandem. Try searching