On the Ps4 version of Minecraft, after update 1.88, the texture for the Ghast appears about two blocks lower than it should. Attempting to hit the ghast's lower half in creative or survival will fail due to the fact that its texture is lower than its hitbox.
-Spawn a ghast. Notice that, if it is spawned on the ground, half of it will appear to be buried.
-Try to attack its lower half.
-Try to attack just above its top.
*As you can see in the image, the ghast is taking damage though I punched the air above where the texture appears. This is due to the fact that the texture is misaligned with its hitbox.
*Edit: I have added a second image to illustrate this bug. The ghast is trapped in a 4x4 block space, and I have placed tripwire between the sides. As you can see, the ghast is activating the tripwire, though the texture does not make it seem like that would be possible.
*Edit: This still seems to occur as of 1.90.