Hi Chris - that was a fix for devices like the HS300 that control more than one relay - some are dual, some multiple. They end up being in a list of child devices when they report back to the queries and I messed up how I was handling them, misidentifying them in AM and rejecting them by UDN. Bit of a pain because the response was so different and I don't have any so need to emulate them - missed it in my testing of that last version :(.
One new feature I didn't mention that might be useful for those of with multiple devices: there's a composite device feature for building thermostats (a sensor combined with a tracker to set the target and a relay to actuate) and similar composite for door controllers (like garage doors) that separate the sensor for the open and close actuators. The garage door I use event triggered rules with conditions to prevent the door from re-opening when it's open, or re-closing when it's closed since my (like many) openers reverse direction if re-triggered. You can find them under "Custom Devices" in the search menu.