Game crashes and losing items

the game has been crashing since early September and now I’m just noticing that when I log back in the game items that I was just interacting with are gone.  So far I know I lost a full stack of iron and approximately a 1/2 stack of gold when grabbing them from a furnace.  I lost a name tag from an anvil and now and entire 9x9 plot of wheat and 2 potatoes right after harvesting.   

This issue and many more all started when 1.6 came out please resolve this soon as I’m very tired of redoing things