That's OK, though, because there's an equally safe place you can chill out if you're just killing time for your resources to process: Mother Base. The material processing timer seems to run just fine here, and no one will take you by surprise and murder you if you have to put the controller down and step away for a bit. All you need to do is check in on your iDroid every so often so the timers 'click over', so to speak, and reward you with your spoils.