Reported this bug a few days ago without any response. Posting here to see if anyone else is having the same problem and hopefully get some help.
When I add a card to a decklist, it seems like after a few seconds, or when I change screens (like adding another card, or coming back later to revise the decklist), that changing the amount of the card crashes the app. It only crashes when changing the amount in edit mode. It can be changed without crashing the app by pressing/holding on the card, swiping to the deck I want (which usually starts at the deck at the very top of the list) and change the amount there. Or I can delete the card and add it again, then change it to the amount I want very quickly. It becomes annoying after a while.
Also, the quantities of the cards don't update when I initially change them (before switching screens.)
Anyone else having this problem? Any suggestions? Thanks in advance.
Which version are you using?
Sorry for the super late reply. I'm using iMtG II. The problem still occurs as described above.