I'm sorry to hear you encountered an issue like that! Did you open your inventory (press 'X', select items) and confirm you definitely still had the floor cleaner and not a different item? It's possible the dialogue for handing over the floor cleaner could have gotten skipped somehow
If you can't give her the floor cleaner then it's some bug because the guy thing comes after that. are you talking about the lady who's pretty bored? Then it's not the lady otherwise it's a bug.
