pig's skin was crushed

Hi, I am playing minecraft on Android phone, and running 1.16.210.56 Bedrock version.

and I found a bug on it. When you put a saddle on a pig, the pig's skin will be crushed.

I don't know why, and I checked many times but it happens still. I am a Chinese player

and I love minecraft so much. Sometimes this bug don't happens, but sometimes will

and many times will. If who can help me, please give me a reply. Thank you.

(As you can see, the pig in this picture's skin is crushed and it's black. But saddle on the

pig and other things are still good. I can explain why.)