Batch restart does not process steps

A Stackoverflow user raised the following issue:

https://stackoverflow.com/questions/51772119/java-batch-restart-does-not-process-steps

In short, the batch job consists of a flow that in turn contains several steps. One of these in-flow steps specifies a stop element on certain exit status and restart step name. When restarting the job execution, JBeret didn't restart from the specified step, but instead completed silently.

Need to investigate:

(1) why it didn't restart from the specified step name;
(2) should there be (or is there) a warning message in case it cannot find the specified restart step?