I've been having an error lately that looks like this in the event log: Uncaught exception (see the 'inner exception' below) has suspended an instance of service 'SomeRoutines.OrderHandler(... The service instance will remain suspended until administratively resumed or terminated. If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception. InstanceId: 875947d5-5c01-4ad7-9d62-a03... Shape name: ConstructUpdateMessage...