Camel SQL Component with Simple Expression

[NES]

Hello,
I am trying to implement a function like a HTTP proxy with Apache Camel.
In my proxy, I want to insert a header value in DB,
and I used Simple Expression in SQL.

Here is my camel route.

<route>
    <from uri="servlet:///foo" />
    <to uri="sql:INSERT INTO TEST_TABLE (TEST_ID, NAME) 
        VALUES(:#${header.testId},
'test')?noop=true&amp;dataSource=testDataSource" />
    <to uri="http4://localhost:8080/test/bar?bridgeEndpoint=true" />
</route>

I was able to insert a header value,
but I lost request body after SQL endpoint in this route.
A response was 400.

The exception is

HTTP operation failed invoking http://localhost:8080/test/bar with
statusCode: 400

I found that the cause is Simple Expression.
However, I don't know why Simple Expression remove a request body,
and how I can resolve this problem.

Camel version is 2.16

Thank you for any help you can provide.



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