Camel ignores custom Jackson ObjectMapper - json

Question

I am trying to replace the standard Jackson as it is described here: http://camel.apache.org/json.html
I am using the following configuration
<bean name="myJsonObjectMapper" class="com.my.app.MyJsonObjectMapper" primary="true"/>
<camel:camelContext id="camel-client">
<camel:template id="camelTemplate"/>
<camel:dataFormats>
<camel:json id="json" library="Jackson" objectMapper="myJsonObjectMapper"/>
</camel:dataFormats>
</camel:camelContext>
MyJsonObjectMapper extends ObjectMapper. I can see it in Spring context, I can autowire and use it. I see that Camel context is started OK, I am using the Camel version 2.20 where this feature is enabled and fixed. However when I am trying to parse JSON I am getting the exceptions which will non-modified ObjectMapper generate.
When debugging I see that JacksonDataFormat is not initialized with customized ObjectMapper but rather creates a new one on doStart() method.
What am I missing on the Camel configuration?
UPD:
I am using that mapper in scope of Camel REST DSL routes in one of the following ways:
restConfiguration().component("servlet").bindingMode(RestBindingMode.json);
rest("/somepath")
.description("blah")
.post("/subpath/")
.type(MyRQ.class)
.outType(MyRS.class)
.route().id("under-test")
.bean(service)
.endRest();
or
restConfiguration().component("servlet");
rest("/somepath")
.description("blah")
.post("/subpath/")
.route().id("under-test")
.unmarshal().json(JsonLibrary.Jackson)
.bean(service)
.marshal().json(JsonLibrary.Jackson)
.endRest();
In both cases I am getting the marshaller error due to the usage of the default marshaller instead of custom one. The routes seem to be started in scpe of the correct context, the same I am configuring ObjectMapper for.