While playing Item Scramble, I unscrambled a word and guessed "Peridot Glass Nail File". It said my guess was incorrect, but the right answer was ALSO "Peridot Glass Nail File", exactly the same thing. I didn't make any typos nor added extra spaces before/after the word. Can't remember exactly the round I was in when it happened, but it wasn't my first word and the others were working just fine. I'm playing on Firefox.

This happens to me periodically as well. Mine was Sweet Little Purse (Base 2) and it was not incorrect.