So two nights ago, I was carrying 4x throwing lances. After I killed somebody with a weapon I wanted [ie a MW Bec], I would attempt to pick it up. If I was holding 1-2x throwing lances, I would pick up the weapon, and my throwing weapons would go missing. If I carry 2x throwing lances [at the beginning], I'm pretty sure this bug does not apply. I am able to by pass this bug by throwing my lances on the floor, picking up the weapon, picking up my lances.
Also, sometimes, when I run out of a throwing weapon, pick up a weapon and attempt to pick up a throwing weapon, I would pick it up, and when I switch to it, it'll say x0, switch back, and I can't switch back to the x0 screen.