Do Bay's canaanite ambushers benefit from his generals' title buffing ammo of javelins?

As per the title: Bay's generals have a high level title that buffs the ammo of javelins by 50%. That's very hefty!

There's a potential problem and I don't have the time to run a whole campaign with him, so I'd appreciate knowing if someone tested this recently. His best javelin unit (canaanite ambushers) are **medium** javelin infantry, and his title/skill tags only **light and heavy** javelins (for some reason).

Does anyone know if this is a display error/typo and the trait/skill actually buffs any of his javelins, or are his best javelins omitted from this? I hope all his javelins get affected.

Thanks