NPE in EventBus.java on query state-change

[kKdH]

14:36:54.381 [event-bus-worker-0] ERROR org.jayware.e2.event.impl.EventBus - Failed to signal query state-change!
java.lang.NullPointerException: null
    at org.jayware.e2.event.impl.EventBus$QueryResult.signal(EventBus.java:729) ~[entity-essentials-impl-0.2.0.jar:na]
    at org.jayware.e2.event.impl.EventBus$QueryDispatch.execute(EventBus.java:523) [entity-essentials-impl-0.2.0.jar:na]
    at org.jayware.e2.event.impl.EventBus$EventBusWorker.dispatch(EventBus.java:410) [entity-essentials-impl-0.2.0.jar:na]
    at org.jayware.e2.event.impl.EventBus$EventBusWorker.run(EventBus.java:382) [entity-essentials-impl-0.2.0.jar:na]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]