My mix BULK submission of 50 cards was received on 12/08. I've put in a list in the box accordingly to the order of the cards.
However, I received an email today regarding not listing all the cards in the invoice e.g Card 1 - Bulk, Card 2 bulk and so on and said that this is significantly delaying the process.
I do get the point however I've seen submissions before like mine and they have always put in Mix bulk with 50x Quantity without adding every single card
In any case, at least I know it's being looked at as I received responses from them so I do think they're doing their best but has a backlog currently.