quarkus rest error handling for WebApplicationExceptions and CompletionStage does not work anymore

[robp94]

Describe the bug

Throwing an WebApplicationException like BadRequestException and subscribing as a CompletionStage is not handled correctly anymore. Prior to 3.11.2 it would result in a 400, for example. Since 3.11.2 it results in a 500.

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    @Path("/hello")
    public CompletionStage<String> hello() {
        return Uni.createFrom().<String>failure(new BadRequestException()).subscribeAsCompletionStage();
    }

Expected behavior

Return the correct Status code given by the WebApplicationException.

Actual behavior

Results in a 500 error.

How to Reproduce?

https://github.com/robp94/code-with-quarkus-rest-error-handling

run the included test

Output of uname -a or ver

No response

Output of java -version

21

Quarkus version or git rev

3.11.2+

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response