SBC sending INVITE directly to endpoint instead of ECB

Hello,

My endpoint registers numbers to the ECB through the SBC. Recently, I noticed that when Auser calls Buser, the SBC sends the INVITE directly to Buser’s IP instead of routing it through the ECB.

I’ve confirmed that my local-policy is configured to send all traffic to the ECB, and the sip-interface has strip-route-headers enabled.

Can anyone help me clarify why the INVITE is not being sent to the ECB? I remember that previously the INVITE signaling would also go through the ECB.

Much appreciated.