Maliiwan armory

After surviving the battle my back pack was full so thinking the vending machine was very near I went to sell to make some room before opening chests, came immediatly back, ALL chests were GONE. WT_???
Anybody know if its a glitch or the way the game plays, , also found out loot machine not active unless on cooperation setting !!! More stuff gone, first all preorder loot now this…getting disappointed with the way this is playing out

I think the chests are supposed to only be there during the story part. If you looted the last one and turned in the quest item they despawn from my experience if you leave and come back.