horses despawning after a little while

Hey mojang so i was playing minecraft pe on a survival world so i got a horse and i didnt have a stable ready so i just kept him in my house a day or two later(irl days) i joined and entered my house and he disappeared i thought he escaped and went looking for him but i didnt find him so i got a new horse i did the same thing and he disappeared again i tamed him put a saddle on him even armor and he still disappeared i did some research on the internet and i saw a video that said that its a common glitch making horses despawn so i got a nametag before i got a new horse and gave him a name i thought i was good to go but still he disappeared so i did some more research and found a reddit post saying that the horse despawns when he goes to the edge of a chunk so i lead my new horse to a fence so this is my current horse and i hope he doesnt despawn but i hope you fix the glitch pls

thank you  TRM