The IntelliJ plugin does not decompile anonymous class correctly

[Ciribomflax]

I used the vineflower-1.9.3.jar to decompile a JAR file and it correctly produced a java source class with the following lines:
client.addRequestInterceptor(new HttpRequestInterceptor() { public void process(HttpRequest request, HttpContext context) throws HttpException, IOException { request.setHeader("Host", IdpMonitorSampler.this.getHost(endpoint)); } });

However, if I extract the same class file from the jar and open it in IntelliJ I see the following line:
client.setRedirectStrategy(new 1(this, endpoint, endpointUrl));

Is it a bug or does the IntelliJ plugin not know how to correctly decompile this case?

UPDATE:
If I also use the IntelliJ plugin File Expander in order to be able to see the content of JAR files, I can double click the class and Quiltflower decompiles it correctly. I guess there's some information missing if I extract the class file from the JAR and then decompile it.