Villagers, mobs and Minecarts disappearing

Greetings, that's my first time using this forum.

I was playing Minecraft PS4 edition as usual. Then one day I load my world and my Villagers from carrot, potato and wheat farms have just dissapeared.
All my minecarts w/ hoppers and some of my sheeps also had dissapeared.

This is so frustrating and still happening, my Villager Farm is almost empty. Every time I load my world looks like something can just disappear.

Please, fix this.