Was this organized play or a home game? And I strongly doubt you'll get a truly official ruling.
Unless there's a rule somewhere obscure that turns abilities off when you sleep, I don't see Link Links severing over any amount of time. While it's not unreasonable to think that people traveling together will, at some point in the day, move more than 110 - 300 ft away from each other, that should have been something the GM already discussed with you. It seems reasonable to me that your character would automatically refresh the links when their allies came back into range if nothing else is going on, if that's how the link broke.
Unless you are playing in game setup by PFS it is a home game. In a home game the GM is the ultimate authority and even if you got an official ruling he would not be bound by it.
This is a Rules Question forum post, so while Rule Zero is always in play, it's not terribly useful as a response unless the text in question specifically appeals to Rule Zero.
This bond continues until the bonded creature dies, you die, the distance between you and the other creature exceeds medium range, or you end it as an immediate action (if you have multiple bonds active, you may end as many as you want as part of the same immediate action).
Seems pretty clear. Sleeping has no effect on a life link. It remains until the oracle spends an action to end it or conditions cause it to end. It isn't a daily thing at all.