Polar bears with badly located collision box

How did I find the error? Well, I'm a Google Play beta tester, I was testing the shield that was added in the beta version 1.10, I started with the hostile creatures and there were no errors with the shield, I wanted to test it with a polar bear, I generated it with its respective egg generator and the shadow appeared on the side of the bear, it did not take much importance at first, this changed when I beat the bear (where the bear appeared not in the shade), I did not hurt him, I did a little research, I realized something: That the shadow appears below the hitbox! It was when I decided to report this error (I did all this in creative mode) (I wrote this using Google Translate).

If you can solve this bug, I would appreciate it a lot.