[Items not showing up on MP after listing]

Forgive me if there is already a topic for this, I have searched through the forum and could not find anything. 

Recently I have been having this problem a lot, after I have listed a gacha item I want to resell and I have searched MP to see if it is there and it does not appear. I have also left this for a few minutes to an hour just in case it is MP being slow and still nothing. My items are not seen by others. 

I have tried removing items from their original boxes or boxing them again myself, still there is the same problem. 

Grrr, can anyone help me?!