A 10 min cooldown is absurd. I understand fixing an exploit but if people want to simply farm lost sector chests by actually completing the objective; why stop them for 10 min at a time. Most lost sectors can be rushed through in under a minute, at most you should have the cooldown at 1 minute until you can open the chest. That way if players want to grind for 500 tokens it takes them a little over 8 hours not over 150 hours.