The following is a breaking change for the 2019.2 distribution of Itential software.
isNaN task and API call has been removed from IAP 2019.2 due to an inability to pass in JS objects like NaN, Number.NaN, and 0/0. Anything that can be passed in this method through REST API or the workflow task will evaluate as false, thereby rendering the task pointless.
getDevicesFiltered to now require the 'limit' property. Previously if the 'limit' property was not provided or if 'limit=0' then the result would yield all devices. If there were a high number of devices, then this would cause timeouts or exception errors. For system integrity, we have removed the capability to list all.