CK II - [3.1 KKAD] %unit_type% modifier for special units don't work

[MemeWizard]

One line summary of your issue
[3.1 KKAD] Special unit modifiers don't work

Game Version
3.1 KKAD

What expansions do you have installed?
All of the above

Do you have mods enabled?
No

Please explain your issue is in as much detail as possible.
Do you have mods enabled? / Yes
In mods, %unit_type% modifier for special units don't work

Do you have mods enabled? / No
In vanilla, war_elephant_leader actually don't give bonuses to elephants

war_elephant_leader = {
    leader = yes
    random = no
 
    command_modifier = {
        war_elephants = 0.2
        morale_offence = 0.2
    }
}

As you can see in the screenshots below, this trait should give a modifier to elephants' damage (both moral and normal from war_elephants), but gives only moral damage from morale_offence

Steps to reproduce the issue.
Check units stats in battle (for some reason, any %unit_type% modifiers, not only specials, don't give effect out of battle)
Get modifier that increase special units stats (like war_elephant_leader that gives war_elephants)
Check units stats again

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