How to fully log the exception callstack of an exception in Camel that is handled in a Camel onException() policy?

Issue

Lets assume we have the following Camel exception handling defined in Java DSL:

@Override
    public void configure() throws Exception {
        onException(Exception.class)
            .handled(true)
            .markRollbackOnly()
            .useOriginalMessage()
            .logStackTrace(true);

        from("direct:throw-exception-with-handler")
            .process(new Processor() {
                public void process(Exchange exchange) throws Exception {
                    throw new RuntimeException("show me some stack");
                }
            });
    }

When calling route direct:throw-exception-with-handler at runtime the onException policy does indeed handle the exception but it does not log the full call stack of the exception.
If we remove the call to .handled(true), then the full exception call stack gets logged.

How can we use .handled(true) and still log the full exception call stack in Camel?