When in Creative mode, in the inventory, you cannot pick up any item. When you click on a single item, it picks up a stack of 64 seemingly out of no where. Same issue when pulling items from the Creative Inventory, left clicking once give a stack of 64. Can't set stacks down in inventory, have to drop it out to the side. When in Survival mode, you cannot pick up any item with the cursor at all. Have tried uninstalling, deleting mods, restarting, shift-clicking, and am not on touchscreen mode. Wasn't an issue a few hours ago, did nothing different to trigger the issue. Searched for someone with a similar problem and none were quite the same.