Yes, it’s version 1.2. And Leviton is paying for it as they should as I have thousands of dollars invested in their products.
I also suspect that the older firmware versions do not correctly route certain other zwave devices properly. specifically the Kwickset zwave locks. This is just a theory but since I added more Leviton switches the locks don’t communicate properly with the hub. I have read that certain devices do not correctly route the Kwickset locks. My suspicion is that the lock has a Leviton switch in it’s neighbor table and routes messages to it, but the switch does not properly route the message to the hub. Some imply that it has to do with the locks encrypted payload. If the locks start working correctly after updating all the Levition switches and a zwave repair, then my suspicions will be confirmed.
I really wish that Smartthings had some decent diagnostic utilities whereas you are able to query a device for its route - the equivalent of traceroute and ping.