Animals instantly die when loaded

When I discover land (I think specialy on shoreline) in distance I see animals (I think only cow, sheep, pig, chicken and rabbit instand die and respawn without trouble, noticed it when picking up their meat, wool, feathers ....

 

https://www.youtube.com/watch?v=zbTVWGdjGno

this is where a clip is and on the distance you can see animals being vaporized

I use xbox bedrock edition and the world is made on xbox one edition and transferred to bedrock edition.