The double tap issue is discussed briefly in the official announcement thread. They’ve changed the way some of the stock device type handlers work as part of the recent update.
You’re right, the local handler for Z-Wave switches isn’t populating the physical/digital field. We actually intended to deprecate and remove that functionality before this release, but that fell through the cracks. I apologize for the communication failure.
The reason we’re not continuing to support the physical/digital field is that it only works on a subset of switch devices, and even then it’s basically just a hack for most of those. For example, on most switches it doesn’t work through repeaters. We’ve also had issues with false positives.
For now, you’ll have to use a custom DTH to continue to get that functionality. I’m hopeful we can replace it with a capability like Button that more precisely represents the device’s behavior, but I don’t know what kind of priority that will hav…