After moving to the v3 hub I noticed that each of my hue bulbs had a duplicate placeholder. I deleted each one and overnite they reappeared?
See if this thread helps …
Is the duplicate in the SmartThings app or Hue app?
Do the devices look the same in the IDE? Did you happen to set Hue up twice: once with the Hub option and once for hubless?
Have the same issue… (have added Hue twice, once with the Hub option and once for hubless)
How to fix?
From the linked thread above: