Interesting observation, qwk.
And a quick note...
I remember a conversation when I had my handles replaced that handles aren't necessarily backwards compatible. By this I mean, when people have had "newest handles" and "not newest firmware" there have been issues with some combinations. Consequently, I find it reasonable and likely that there might be some "forwards compatibility" issues (when you upgrade to newer firmware) that don't always get noticed prior to the new firmware reaching customers.
And a quick note...
I remember a conversation when I had my handles replaced that handles aren't necessarily backwards compatible. By this I mean, when people have had "newest handles" and "not newest firmware" there have been issues with some combinations. Consequently, I find it reasonable and likely that there might be some "forwards compatibility" issues (when you upgrade to newer firmware) that don't always get noticed prior to the new firmware reaching customers.