RESTeasy ContainerResponseContext.setStatus() bug

package com.arig.resteasytest;

import java.io.IOException;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.ext.Provider;

@Provider
public class ReponseFilter implements ContainerResponseFilter {

    @Override
    public void filter(ContainerRequestContext request, ContainerResponseContext response) throws IOException {
        String url = (String)response.getEntity();
        if(url != null && url.startsWith("redirect://")){
            response.getHeaders().add("Location", "http://localhost:8080/rest/ping/test");
            response.getHeaders().add("Content-Type", "text/html");
            response.setStatus(301);
        }
    }
}

//----------------------------- RESOURCE --------------------------------

package com.arig.resteasytest;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

@Path("/ping")
@Produces("application/json")
public class PingResource {

    @GET
    public String ping() {
        return "redirect://{\"ping\":\"pong\"}";
    }

    @Path("/test")
    @GET
    public String test() {
        return "{\"test\":\"test\"}";
    }
}