Thanks for the continuous improvements on the site, Sebastian.
It looks like this release removed what I believe was optional behavior in the "Add Card" section on the Inventory page.
Basically, if you added a card that you already had in your inventory, there used to be an option to separate the new card and not auto-merge with the existing cards. (I don't remember what the behavior was when that option was toggled - it might not have added any cards. I never really used it.)
When I add cards to my inventory, I really prefer to have them show up separately until I hit "save" so that I can specifically see the number of cards that I'm adding. Now I see just one row (assuming only one edition) with a count that is N+1 where N was the number previously in my inventory. If I'm adding 8 cards, I need to replace that with N+1+7. It's a pretty disruptive change to my workflow.
Thanks for your help,
--Jim