Snow golem heads don't dither when approached

The bug

For some reason, mobs are supposed to turn transparent now when you get by them. This doesn’t work for the pumpkin head of snow golems. Other equipment like armor on mobs does work, so it’s expected that this part works too.

How to reproduce

1. Spawn a snow golem

2. Walk inside it

Expected result

It should turn transparent

Observed result

The pumpkin head stays fully opaque