The back decoration engineer detector sold this time does not have scanning function

As the title suggests, I have read the introduction of the backpack engineer detector for this special sale, which states that after wearing this backpack, the items you pick up will be scanned before entering the backpack, but in reality, it has no effect at all. Is it a bug or has this feature not been implemented yet. I hope to receive an official and correct response

I have been waiting for a whole day, why hasn't I replied?