It seems the leg armor mods for auto loading holstered void weapons aren't working.
At least on the Harsh Language void wave frame launcher.
I tried using a regular void holster mod, the harmonic one while having a void subclass equipped, and also tried having both equipped. No go.
Solar and kinetic both work. I haven't tried Stasis, Arc and stand though, so I'm not sure on those
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Holster mods dont work on special ammo GLs and rockets - for those 2 weapon types you will need to roll auto loading holster on it if possible