scoreboard incorrectly updates stat.craftItem scores when shift-clicking to craft

To reproduce:

/scoreboard objectives add A stat.craftItem.297
/scoreboard objectives setdisplay sidebar A

craft some bread, drag bread out of crafting table --> scoreboard correctly increases score by 1

craft some bread, shift-click bread out of crafting table --> scoreboard INCORRECTLY increases score by 2

I shall post a 48-second video which demonstrates this bug visually in a moment.