Certain configuration elements not read correctly

I am unable to create a custom interceptor for a specific NamedCache via xml configuration.
The only solution using external configuration is to add the <customInterceptors> element to the <default> cache - but this applies the interceptor to all caches.

<customInterceptors>
<interceptor after="org.infinispan.interceptors.CallInterceptor" class="com.test.MyCustomInterceptor" />
</customInterceptors>

Programmatic configuration works in Embedded mode but this can't be used with hotrod as calling getAdvancedCache() results in an UnsupportedOperationException.