Is a "broadcast packet" the same thing as a "hail"? If not, disregard the rest of this post. 
It looks like the Hubitat CommandClass stuff supports 0x82/HailV1 .
https://docs.hubitat.com/index.php?title=ZWave_Classes
Weird that it wouldn't get kicked up to the parser()...but now that a clearer picture of the issue has emerged, searching the forums is becoming easier. It appears that others have had this issue with the C7 and Leviton DZ15S.
Also, in each of those posts, it actually appears that the hail does actually make it up to the driver. Since I'm not seeing the hail, I wonder what's different.
@mike.maxwell wrote that something regarding the hail would be fixed in 2.2.3, but I'm on 2.2.4.158:
One of the posts mentioned looking at the "Data" section of the device details. I do note that they had 0x82 in their outClusters, but I do not. Could this be the difference? How do the inClusters and outClusters lists get populated? I believe they are CommandClass mappings?
- zwaveSecurePairingComplete: true
- S2: 3
- deviceId: 12597
- deviceType: 18770
- manufacturer: 99
- inClusters: 0x5E,0x55,0x6C,0x9F,0x22
- secureInClusters: 0x25,0x85,0x59,0x86,0x72,0x5A,0x73,0x5B,0x70,0x2C,0x2B,0x7A
- zwNodeInfo: D3 9C 03 04 10 01 5E 55 6C 9F 22 68 23 F1 00 25 85 5C 59 86 72 5A 73 5B 70 2C 2B 7A
