Dragon Hit Box Misaligned

When I press F3+b The ender dragon's green hit box appears above of the dragon. The actually hit box is still on the dragon because I can still hit him in the places the hit box would normally be. It is only the green hit box that is misaligned, the white hit box displays properly. It also changes horizontal position based on how far the dragon is away from 0,0 and it change s in the direction of the displacement.

How to reproduce:

1. Go into the end.

2. Press F3+b.

3. Look above for green hit boxes.