Simply, all kinetic slot glaives (Rake Angles/ Refusal of the Call) gain 1 special ammo instead of the intended 2 when picking up floor ammo.
Note: Wall ammo functions properly, just not floor ammo. I hope this issue can be recognized, as it seems like a simple fix and has been around for a extended period of time now.
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Short clip of it happening if it is required: Glaive ammo bug demonstration https://youtu.be/Mwstah3ZoT0