I have this same issue as well. One or two bulbs or will randomly disconnect from wifi and become unavailable. They are all well blanketed with strong wifi signal. The only fix is to reset them and...

What would the process be to add the two X60's to an existing M5 network? Add one X60 and then make that the "main" Deco? Will the M5's work OK with the new system? Thanks for any advice.