I think it is known how high the items you can get from NG+ rise based on how far you've gotten (getting 300+ moths in one sitting in NG+34 for example), but the moment you go back to, let's say NG+20, the item amounts seem fine at first until you switch wolves... or at least that is what I am noticing. They seem to reroll to the smallest quantities possible, as if you hadn't finished the main trek to get to NG+ in the first place and I don't know to what it is tied to or if it is intended. After playing for a bit I noticed the amount of items going up based on the wolves levels for a bit, yet I am not so sure this is the cause either because when I switched wolves again (giving that I'm training them) the quantities didn't seem to reroll and... it's just really confusing.