Mobs in my world disappearing or despawning after exiting the game or if the game crashes

I am experiencing an extremely frustrating bug on bedrock edition of which certain mobs I have despawning or plain disappearing anytime I close out the game or the game crashes. I have had issues of having pens of pigs, chickens, and cows where after coming back, I will only have a fourth or none at all remaining, alongside my horses and donkeys just disappearing losing any armor, saddles, or loot attached to them, and villagers also disappearing at random, of which were some that were at master rank levels. It is extremely infuriating as any time and resources I put into these mobs are all gone to waste, wasting crops and losing valuable loot and trades. Please fix this issue as soon as possible and also if you can, somehow re-add the mobs and villagers that were lost as they shouldnt have disappeared in the first place