Skript not reading a variable

[SuperEpps22556]

Skript Version: Skript 2.4.1
Skript Author: Bensku
Minecraft Version: 1.15

Full Code:

on projectile hit:
    if projectile is an arrow:
        if shooter is a player:
            if {perk.explosive.%shooter%} is true:
                wait 3 seconds
                create an explosion of force 3.5 at location of projectile
                delete projectile

I don't understand why the script isn't reading "if {perk.explosive.%shooter%} is true:" as I broke it down piece by piece to see what the error was followed by this code that works. The projectile is shot, hits anything, and doesn't explode.

command /pk [<text>]:
    trigger:
        if arg-1 is "clear":
            [code]
        if arg-1 is "explosive":
            if {perk.slot.%player%} is true:
                send "&cOnly one perk can be active at a time!" to the player
                stop
            if {perk.slot.%player%} is false:
                if player has permission "perk.perk.earrow":
                    send "&aExplosive Arrows perk activated!" to the player
                    set {perk.slot.%player%} to true
                    set {perk.explosive.%player%} to true
                    set {perkslot.slot.%player%} to bow named "&bExplosive Arrow"

I did a smaller scale test of this code and it works fine. I've been scratching my head since there's no console errors or skript errors.

command /test:
    trigger:
        if {perk.explosive.%player%} is true:
            send "This works" to the player

Have you tried searching the docs? Yes
Have you tried searching the forums? Scrolling through I haven't seen it
What other methods have you tried to fix it? Tried setting different "if" statements and taking out lines. Adding a 'Send "This should work" to the shooter' line to see what line it's not picking up. Worldguard is installed and I tried setting the region to creeperexplosion allow, otherexplosion allow, and tnt allow