Controllers Grabbing Stacks in Creative

When using a Bluetooth controller, pressing A while highlighting an item in the Creative menu will instantly put a full stack of that item in the next available hotbar/inventory slot. Pressing A is supposed to grab the item, let it hover over a highlighted spot, and allow the player to choose how many of the item to take and where it goes. Y is the only button that is supposed to grab and auto place a full stack.