When I try to place one of stacked items using the option+click ability, it doesn't work. It also doesn't work when I try to pick up half of an item. Many of my items are stacked, and I can't craft some rare items because of this.

I expected option+click to place one of a stacked item

It placed all or none of the stacked item

Happens in all situations as far as I can tell
I have restarted the program many times, yet it pursues to occur