Im having the exact same issue but for ALL my existing Groups!!! Started a few hour ago.
Just suddenly tonight everything i ask Alexa to do she responds with "A few things share that "name", which one did you want?" Ive isolated it down to Group Names. Individual devices work ok.
However, for example, if i ask her to "turn off dining room lights", which is a group name containing 2 lights, I get the message above. Ive checked groups and there is only 1 group name of Dining Room Lights. I then deleted the group name Dining Room Lights and she is still giving me that same message despite no group name even existing. How is that possible? I put back a new group name of Dining Room Lights, still same.
I put a new Group Name called "blob" added the 2 lights and that works.
Its like this for every Group Name I have.
Asking her to turn on FireTV I get same response!
It just started literally like 3 hours ago.
Anyone else? Or can anyone help?
PS the Group Name buttons from within the Alexa App work. i.e I can turn on "Dining Room Lights" from within the Alexa Apps