So I was messing around in my settings trying to increase Minecraft's frame rate and I ran into a problem. After allocating 4G of memory to Minecraft, setting the java.exe and javaw.exe to high priority in the task manager and reducing sound and particles to the bare minimum, my shift click won't work on items in my inventory nor in chests and when I drag a stack of items it will randomly drop just one of the items into the slot it is over. It also wont do anything when I click on the stack just once with a left click.
If anyone has an idea on how to solve this please help.
If anyone has an idea on how to solve this please help.