The beforeProcessingSpecification event is triggered before the check for cached specifications is performed. This can lead to beforeProcessingSpecification being triggered more than once for the same specification.

This is apparent in https://github.com/concordion/concordion/actions/runs/942110903 and does not occur when a single specification is run (https://github.com/concordion/concordion/actions/runs/942096089).

Once fixed, the workaround in ExampleEventTestExtension#ProcessingSpecification(SpecificationProcessingEvent event) can be removed.