Vindicator named "Johnny" doesn't attack ghast

The bug

Vindicators named "Johnny" don't attack ghasts.

Expected Result

Vindicators named "Johnny" would attack ghasts, as they attack every other living entity except armor stands (and baby villagers).

How to reproduce

/summon minecraft:ghast ~10 ~3 ~ {NoAI:1b,Silent:1b}

/summon minecraft:vindicator ~ ~ ~ {Johnny:1b}

Code analysis

Code analysis can be found in this comment.