These are typically NAT connectivity based issues and there aren't any specific ways to prevent them. Your best bet is to retry whatever it is you were trying to do or change up your router's port settings so that you can allow the necessary connection responses to the game's servers to pass through unrestricted.
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It happens every time I go to orbit. I hit orbit and "connecting to servers." I've played Destiny for nearly 80 days of time on my characters. This problem happened this week. It can't possibly be NAT issues.
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Could be an issue with your router
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Possibly. Not sure why it's happening now, as opposed to the last two years.