Recurring ingame crash after playing for a while;

An error has occurred in the following application:
(CE-34878-0)
Minecraft

Although crashes in games aren't very surprising, what IS getting extremely annoying is that, upon reloading the game, half of my existing entities are lost. This includes (leveled) villagers, cattle, horses, minecarts, etc. Inevitably, all my attempts to grow my populations and to breed animals, as well as using faster means of transportation, are ultimately in vain. 

This has happened multiple times in my survival world. Could you look into it and make it so that random crashes don't ruin the game?

PSN ID: aribaariba