I guess those are S2 Unauthenticated devices without any PIN code. There is an app called UnZ-Cure in the HCS available, but the HCS is actually down. However, with this app you are able to include all devices unsecure.
Sorry, but I hate such ignorance from Athom. Also, according to my information, Fibaro devices are also affected, as @CyberSponk also confirms. Guess who is the app developer.
Oc, I guess you changed all interval settings because the HP23 is more powerful than the HP19… 
Thank you all for your feedback.
