I was traveling with a rifle on my back and one in my hands (mosin). Upon eating something and then trying to get the mosin back in my hands I started to run again but noticed I didn't see the nosil of the gun sticking out to the side of my character. I hit 1 and 3 on the keypad (screenshot attached) and also checked my inventory and confirmed it wasn't on my person, and when I ran back I found it on the ground where I had been before. However, my character was still in the "armed with a rifle type weapon" animation sequence while running/etc. After trying to pick up my mosin for a second time it finally worked and was in my hands.