I’ve seen this as well. I have a bunch of ZEN27 dimmers here, one at firmware 2.08, rest at 2.07.
I’m switching everything over to my new c-7 hub, and I somehow managed to include a couple of them as non-S2 devices (don’t ask me how though!). These non-S2 devices worked with this driver just fine, but the S2-connected nodes are only functional with the built-in driver.
Hope this helps some folks.
