Damn rounding errors resulted in neither the full bid nor full ask getting filled leaving dust on the orders.
I had a check in the engine to make sure that one order or the other was always filled and to exit if not to prevent sending all delegates into an infinite loop. That check triggered and stopped the GLD market.
The rounding errors were much higher than I anticipated possible (I had checks in there for this)... I have since implemented a more robust approach to rounding that should address this issue. Yet another test case for us to add.
Note: we had test cases for it working even test cases with rounding errors.... just not test cases with rounding errors this large.