I have a job that required colored bulbs and fixtures installed on a dock, resulting in 10 post lights. I put in Sengled colored Zigbee bulbs and I had issues with some bulbs not reacting properly. I then put a few Zigbee plug sockets around and that improved things but on occasion I would still have issues.
I did some homework on the Sengled colored bulbs and discovered that they are end of line devices and do not have repeaters. That is probably the issue. I also noticed that they generate a lot of Zigbee traffic.
I just put in 2 INNR colored bulbs, which do have repeaters, and they worked perfectly. The other 8 bulbs work much better but if I push them hard (on/off/on/off) then some of the 8 Sengled will not respond.
This is not a request for help but an information post for others who are buying colored bulbs. I have to say the INNR bulbs are great and should be purchased over the Sengled.