@IdempotentReceiver annotation does not work with @Bean if the bean is a MessageHandler

When @IdempotentReceiver is present in a @Bean method which returns a MessageHandler, the IdempotentReceiverInterceptor cannot be applied. If the @Bean method returns a Transformer, then it works fine.

It seems @Bean for a MessageHandler has a complex id which the IdempotentReceiverAutoProxyCreator failed to match the bean name and apply the IdempotentReceiverInterceptor.

Testing config and client have been attached to reproduce the issue.