Unable to call "direct" route used by REST DSL from separate route

Issue

• Given a the following (example) route definition where both the REST route and a separate route (Route02) try to call the same direct endpoint (direct:hello):

  <camel>
      <rest id="Rest01">
          <post path="/rest01">
              <to uri="direct:hello" />
          </post>
      </rest>
      <route id="Route01">
          <from uri="direct:hello" />
          <setBody>
              <simple>Hello ${body}</simple>
          </setBody>
          <log message="R01: ${body}" />
      </route>
      <route id="Route02">
          <from uri="timer:Route02?period=2000" />
          <setBody>
              <simple>Hello</simple>
          </setBody>
          <log message="R02: ${body}" />
          <to uri="direct:hello" />
      </route>
  </camel>
  

  An error like the following occurs from Route02 when it tries to call direct:hello:

  Failed delivery for (<message>). Exhausted after delivery attempt: 1 caught: org.apache.camel.component.direct.DirectConsumerNotAvailableException: No consumers available on endpoint: direct://hello.
  

• How to call a "direct" endpoint that is used by a REST route from another route?