Looks like the Identify Bug cropped up again with the newest Fire TV version. The game will take your money, but will not identify items. Items stay unidentified.
Have you changed your button config at all? Also, can you send me a pm with you DQ account email? I want to try to repro this on my end.
I have tried this every way I know of. Each time I identify an item on the fire tv it correctly removes the ???'s and allows me to equip the item. Is there something I am missing in the way you got this to happen on your end?