I noticed last night while crafting that the item counts were not updating.

1. Check my items:

Item 1: 12
Item 2: 7
Item 3: 12

2. Craft Recipe with success

3. Repeat recipe and in the item selection menu it reads

Item 1: 12
Item 2: 7
Item 3: 12

I expected everything to be reduced by 1 but this wasn't happening. Then all the sudden things would correct themselves after a couple synthesis attempts. Not a huge bug but still a bug.