So I got the quest to sell 25 items. No biggie, right? Just go to the new selling menu and sell a whole batch all at once, right? Wrong! It only counts as one sale. You can't even sell them one by one in sequence, you have to completely get out of the inventory menu, go back in, go to the selling screen, select an item to add to the cart, sell it, get out of the selling screen, get out of the inventory menu, rinse and repeat. 25 times. What an incredibly crappy design.

And to add insult to injury, it happened right at the time when an event is going on. Just wasted 25 items, didn't get the quest, don't have any items to sell/upgrade for future quests, don't get any new items for the next week, since all the energy has to go into the event for the chance to get something out of it. Fuck this game.