Dimmable, color adjustable bulbs (assuming they exist)? Oh. Didn't think so either: an analog dimmer will resume operation right where you left it, no spontaneous resets to 100%.
Indeed. Then it's restored to previous state (which could be "on" or "off"), not reset to "always on." Even my computer's BIOS could do that ("on power restored, turn on if that was the previous state, otherwise keep off") in 2000, is the smart lightbulb dumber than that? That's a very unfortunate level: smart just enough to be annoying, but not enough to be useful.