The feature that allows a mobile player to quick craft by touching and holding lags horribly, and it does not stop after completing a stack anymore so too many materials end up getting used due to the lag.

I dont know if it was intentional, but the new double tap feature to quickly move items to/from inventory is also affecting ability to craft, which ends up wasting all of the material the player is holding. If it was intentional then it's just inconvenient because if I tap to craft twice, it's because I only needed that much, not more; if needed a large quantity I'd tap and hold - which is also not working properly right now anyway.