Routing lookup in the registration cache does not work

Hi,

I have the problem that the routing lookup doesn't work in the registry cache.

Phone<-->Access realm<--->SBC <--->Backbone realm<-->Proxy

I configured on both sip interfaces (access/backbone).

registration-caching     enabled

reg-cache-route       enabled

I also add the local-policy on the access realm to the proxy

The phone registration was successful and I also have the entry in the registration cache

(sh registration sipd by-user XXXXXX detailed)

On the backbone realm I use local-policies for other purposes as well, but there is no local-policy for the phone in the access realm, as I understand it is not required due to the registration cache.