Hi! So, I've had this problem since 1.14.3 came out, and I hate it. In chests or crafting tables I use Shift+Left Click to get things into stacks, and it does not work. I've looked it up and can't fix it. I really need help. Thank you. (Especially for this bug tracker 🙂) And also, whenever I double click it wont work 😞.
To get things into stacks just double left click. To "shift click" all of a certain item into a chest, take a item hover it over the item u want moved, shift and double left click.