ctrl_alt_del_myself

Just got forge on a new laptop and everything seemed alright apart from me not being able to hold left click and shift and move many items from my hotbar to my regular inventory, or be able to quickly take items from chests by holding shift and left click and dragging my mouse over them. Does anyone have any idea why this happens / a possible fix? Ive checked touchscreen mode is disabled and my shift keys work fine, i can shift click individual items around and theyll move quickly but not a group of them, only one at a time. Ive checked it wasn't any mods by running vanilla minecraft through forge but still no luck.