My horse and dog got deleted after a lag in the game. I got off the app and my pets had vanished. Every animal was there except them.

My dog and horse got deleted from my Minecraft world. I had a small lag which was unusual because I rarely have lags. Then the animals freeze so I get off the app and get back on and they weren't there. All the other animals were. I had searched and searched but I couldn't find them. I was in the same spot when I got back on so it did save but for some reason my pets didn't Also the grass blocks were see through from the sides. But they are not like that anymore.

I would add a picture but it wouldn't make since because they are gone.