From the mobile app status perspective, the unreachable bulbs no longer display the correct status. From automation perspective no action is taken. From my quick research, there is no solution out there to fix this on the Hue hub. From what I can tell by just playing around, I noticed that turning on the bulb in Hue and then cutting the power supply for 15 seconds and back on, the ‘unreachable’ flag goes away, but it seems like is just temporary until you turn off the bulb from Hue app. I am pretty much done with these. I am looking for replacements right now. I will either get Hue bulbs or just dimmable LEDs.