Gun Inventory Issues

So I play on PC and PS4. My ps4 doesn’t have any major issues with inventory. But when using my pc, I can only pick up tier 2 weapons and below, or they wont populate in my inventory. This is understandably anoying when I purchase a dlc and can only use the worst weapons it offers. This is deffinatelly not a network issue, since nothing like this happens in any other games I play.

PS, this happens the worst with rifles, machine guns, etc. But it can also happen with handguns.