When editing the custom SwitchYard Service Task, there is an attribute with a label called "Fault Action". The correct i/o param that gets set should be "FaultAction", however what actually gets set is "FaultWorkItemAction":

So this:
<bpmn2:dataInput id="DataInput_6" name="FaultWorkItemAction"/>

Should really be this:
<bpmn2:dataInput id="DataInput_6" name="FaultAction"/>

Additionally, per the advent of SWITCHYARD-1606, a new FaultAction has been introduced. Previously there was ABORT, COMPLETE, THROW, and <null>. We need to add SKIP. "SKIP" as a value preserves the old default behavior of <null> before SWITCHYARD-1606. Now, the default for <null> is THROW, so SKIP needs to be added.