setHeader not working as expected with split

[Imran Raza Khan]

I have following code, in which header is not available in main route after
coming back from direct route and which is set after split


from("timer://ipc?repeatCount=1&delay=5000")
.routeId("timer-ipc")
.to("direct:Route1")
.choice()
.when(  simple("${in.header.bookno} != null ") )
.to("direct:Route2")
.end()
.to("log:my?showAll=true&multiline=true");


from("direct:Route1")
.routeId("Route1")
.to("kubernetes-config-maps:///?kubernetesClient=#kubernetesClient&operation=getConfigMap")
.setBody( simple("${body.getData()[my.json]}") )
.setHeader("Test",simple("This Header is available in timer-ipc route "))
.choice()
.when().jsonpath("$.store.book[?(@.price < 10)]")
.setBody( simple("${body[0]}") )
//.split(body())
.setHeader("bookno",simple("${body[no]}")   )  // This Header is not
accessible in timer-ipc route if set after split but works with setBody
.end();