I have tested 3 types of ZigBee bulbs currently or previously available in the US with your new “Restore State if Power Lost” setting. The following are the results:
Ecosmart (Home Depot) bulbs work as expected with your new “restore state if power is lost setting”. Unfortunately for most people these bulb are not currently available. Fortunately for me I bought a bunch for of these for $1.75 each on clearance last summer.
Sengled and Ledvance (Sylvania) bulbs do NOT work with that setting. They still turn on when power is restored regardless of the setting chosen.
So, I will move an Ecosmart bulb into our bedroom lamp and that will solve my problem of the light turning on in the middle of the night after a power flicker.
As aways thanks for your help in solving this problem.