Large worlds crashing VERY OFTEN

This crash has been occurring for a while now. Its been occurring for about three major updates (1.11 I believe). My survival world takes up about 150 mb of space (112 mb when 1.12 came out) It has been happening more frequently in the past month. The crash only happens on the worlds I have around 100+ mb. It even crashes other players during multiplayer. This bug is a real nuisance and it needs to be fixed fast. It is becoming very arduous to play on this world, and the other large worlds I have.