ResponseProcessing Failed to convert a response into an exception

[hyder]

Environment Details

• Helidon Version: 4.0.5
• Helidon MP
• JDK version: Java HotSpot(TM) 64-Bit Server VM Oracle GraalVM 21.0.1+12.1
• OS: Ubuntu
• Docker version (if applicable):

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Problem Description

When returning a Response with 204, but some content is returned anyway, tests fail with the error: ResponseProcessing Failed to convert a response into an exception

Steps to reproduce

https://github.com/helidon-io/helidon-cloudbank/pull/1/files#diff-e30cbc5f82170a6be47936061f1eb6c9e8218618ba2fbdea8a358fea776ad68aR71

[tomas-langer]

When no content status is used and entity sent, the connection gets broken and the next request on that connection fails with invalid status (-1).
This may be reproducible in SE as well.