Strang despawn glitch

I initially thought the glitch I was getting was MCPE-21416 my entities in my survival world I play on keep disappearing I know MCPE-21416 causes entities on chunk borders to disappear. So I put my entities as far away from a chunk border as I could. They still randomly disappeared upon leaving and re-entering. A strange thing I noticed is because my dog that I had for one year in the world suddenly disappeared I got a new one with the same name pretending it was him and replacing all the other entities I lost. But it seems to happen to new entities I tamed as the only 4 entities that were tamed or fed before that don't seem to have the glitch effect them. I have some pictures down below the first one is before the glitch happened and the last 2 are after. This happened while recording too so I have some visual proof. It also affects villagers and snow golems as I have noticed. Half of my villagers were on a chunk border but the half that weren't actually all disappeared. The snow golems weren't either. I really want this fixed as it is dampening my motivation for my world I have put so much time into.