Wow, yes, different person, apparently the same problem. On the Alexa app all of the devices list the same person’s name as the “registered to:”. I can’t find any way to validate that the same email address etc. is associated with that person’s name.
BTW, I don’t think it’s specific with any of the bulb names, it fails the same way on all of the bulbs and switches. (while all of them work from the dot.)