This’ll likely be my final response for now. After fiddling with a bunch of random settings, I’ve managed a workaround by setting Use Attach Parent Bound on the player mesh to true by default, and then setting it to false once the player picks up a weapon.
If Use Attach Parent Bound is still true after the player gets a weapon, then the rendering on their arms and weapon becomes severely distorted. But right now I don’t have any visible animations when the player’s unarmed, so having that setting start on true will keep their mesh “rendered” until a weapon is picked up, at which point the rendering will start working like it should.
If anyone has a more “proper” solution for me to use, I’m very much open to it.