Swapping weapons with NPC's

[Deminious]

Map Name: Campain Act I Abandon ship
Game Type: Normal
Location (where in the Level, where in the menus, etc.): Right before the leviathan destroyed the raven
Were you in a Party?: Yes
If so, how many were in your party?: 3
How did you join? (invite, join button in party panel, blade, etc.): Invited other players
How did you leave?: Will be leaving through the menu.
Ranked or Public or Both?: N/A
Was this in your first match or after transition?: N/A
What was happening right before the issue occurred?: Son was swapping weapons with Anya NPC
What is your NAT type?: Open

When he swapped weapons with Anya she took his Lancer but gave no weapon in return. Thus leaving him with a empty slot. When he tried to swap again she wouldn't give another weapon.

When he tried to pick up a random dropped weapon, it would change back to his Double barrel mid animation. Not allowing him to get another weapon. The weapon he tried to pick up would disappear.

He could no longer swap with npc's but he could swap with other players.

[Deminious]

Update: Restarting the systems and reloading game didn't fix it. Had to restart the campain from beginning. Glad we weren't far lol.

Also noticed when reloading the saved file it said we were on hardcore. when shecking the dificulty level it was on normal on all 3 profiles.