Looks like the UT-01 OEM manufacturer is getting Lumintop warranty paperwork mixed in with Utorch production.
I wonder if a similar miss-match thing happened here… They used the “cap” from an EDC05, but constructed it without the magnet inside for the UT01. End result would be a taller cap, by which would result in an open circuit and a tailcap board that does not contact the UT01 body tube.