i have changed the default node behaviour (when a node is not configured with a behaviour executable) from wait state to pass-through.
i see pro's and con's to both wait state and pass-through as the default. but in the end it is just a matter of convenience. in theory you should put the desired behaviour in the node's executable action.
this had some impact on the test suite. fixed all of these.
Ok, I have also updated Bonita related test to take into account this change.
As you mentioned, to avoid issues the best is just to set the desired behaviour of each node