Missing weapons, collectibles etc after playing with others

A group of friends and I tend to team up often. I notice that if I pick up a weapon or collectible on another friends game it will not show up in my game when I run solo. Nothing really wrong with that except the fact the location I pick these items up are not counted and so I can get 100% on item collection cause the game think I did not pick the items up

2 posts were merged into an existing topic: Co-Op to Single Player Collectibles