Hello and sorry for the late reply.
You are correct. This is actually a bug in the Concurrent Node.
To fix this, please open up ConcurrentState.cs file and:
1) In the OnEnter Method, add this line of code above everything else: conditionList.Enable(graphAgent, graphBlackboard);
2) In the OnExit method, add this line of code first as well: conditionList.Disable();