I received the halo 2 battle rifle out of a gold pack but be cause of connection errors it didn’t save
Don’t worry, you won’t have lost any items. What happens here is that the opening animation for the packs gets skipped over but the items do still get deposited in your REQ inventory. You need to hard reset your console to see the updated inventory in-game, alternatively you check for new items here on Waypoint: https://www.halowaypoint.com/en-us/games/halo-5-guardians/xbox-one/requisitions/categories/customization?ownedOnly=False