I am not sure about the exact backend event but for me the single player loadout doesn't save properly. On the official antistasi server. loadouts do save but can be inconsistent and it is my understanding that the community developer has been working to try to make that work. As a work around I suggest you save the loadout settings within the arsenal and dump all limited quantity gear into the arsenal, save, then quit the game. Next time you boot the game, just load your saved loadout from the arsenal to retain the limited gear. It really is not that big of a hinderence. Every time i resume my solo campaign, i spawn with a blank gear and reload the presaved setup.