I have the referenced bulb in place and controlled by a few simple rules (turn on at specific time, etc.). The bulb has worked without any problems for well over a year. Recently with no identifiable change on my part to hub, rules, network, ip addresses, etc. , the bulb seems to be losing its network connection. When this occurs, I lose the ability to control in via rules, voice and even the native Kasa app. Power cycling the bulb resets everything for an indefinite varying (20-40 hr) timeframe.
I think my best plan is simply to replace it with a more cooperative device, but wondered if anyone had alternative suggestions. (For what little it is worth, I did update the firmware after having the problem for a week or two, but it had no impact on the problem).