Cree Connected Bulb Issues

You need to try the reset procedure and be precise.
https://support.smartthings.com/hc/en-us/articles/204258280-Cree-Connected-LED-Bulb

Also I would try this: (I believe the CREE Connected Bulbs are actually ZigBee however someone mentioned until they did this they had connectivity issues with all their devices)
https://support.smartthings.com/hc/en-us/articles/200981864-How-do-I-make-sure-my-Z-Wave-devices-are-routing-optimally-

Yes, many people are having troubles getting them connected.