@Asynchronous methods execute sequentially, although being invoked asynchronously

A BaringController that is @Singleton, @Startup is invoked periodically through @Schedule method.

In the @Schedule method of BaringController an @Asynchronous method of a @Stateful BaringWorker is being invoked.

What I observe (see attached replication project) in log output (solely console output) is that although @Schedule method of BaringController is invoked DURING execution of @Asynchronous method of worker, the consecutive invocations of @Asynchronous method are sequencial!

In other words - @Schedule method of BaringController is invoked during execution of @Asynchronous but the consecutive invocations of @Asynchronous "wait" until previous invocation is complete.

Thus effectively I have only one running @Asynchronous thread at any given time.

As I understood from comments in irc this should not be the case.

Thanks and best regards
Reinis