Error during type conversion from type: org.apache.camel.converter.stream.FileInputStreamCache to the required type

Issue

• Bridging http endpoints in camel-undertow throws: "Error during type conversion from type: org.apache.camel.converter.stream.FileInputStreamCache to the required type" when the body size exceeds spool threshold
• FileInputStreamCache body file written to disk is already deleted before Undertow can send a response to the client

getContext().setStreamCaching(true);
 getContext().getStreamCachingStrategy().setSpoolThreshold(3);
String data = "abcdefg";
 from("undertow:http://localhost:8080/client")
                .setHeader(Exchange.HTTP_METHOD, constant(HttpMethods.POST))
                .to("http4://localhost:8080/server?bridgeEndpoint=true")
                .to("log:lgName?showBody=true")
                .end();
        from("undertow:http://localhost:8080/server?httpMethodRestrict=POST")
                .setBody(simple(data))
                .to("log:lgName?showBody=true")
                .end();

It gives this error

10:52:49.265 [XNIO-1 task-1] ERROR io.undertow.request - UT005071: Undertow request failed HttpServerExchange{ GET /client request {Connection=[keep-alive], ......}}
org.apache.camel.TypeConversionException: Error during type conversion from type: org.apache.camel.converter.stream.FileInputStreamCache to the required type: java.nio.ByteBuffer with value org.apache.camel.converter.stream.FileInputStreamCache@7004a5b4 due Cannot reset stream from file /tmp/camel/camel-tmp-e7ef56b4-ec43-4547-abba-3848a6a68d3d/cos6853789720494692894.tmp
    at org.apache.camel.impl.converter.BaseTypeConverterRegistry.createTypeConversionException(BaseTypeConverterRegistry.java:667)
.................
Caused by: org.apache.camel.RuntimeCamelException: Cannot reset stream from file /tmp/camel/camel-tmp-e7ef56b4-ec43-4547-abba-3848a6a68d3d/cos6853789720494692894.tmp