minecraft suddenly keeps freezing

recently when ive been playing minecraft will freeze at any given point. i can still run around, break blocks but they dront drop anything, mobs cant move or be interacted with in anyway nor can chests and functional blocks and if i force close the game and open the world again it goes back to even before the freeze and i loose items, a bunch of placed items/blocks disappear and i have no idea why its happening. i was working fine and ive dont nothing in my mod list to change it, not even update mods and now this is happening