Probably trying to get a breather and prep for game 2 after the OT. Not great to see happen, but having broadcasted I can see their perspective being one crew.
There's generally not a lot of post game on these streams anyway, having watched the replays of past 4 championship games on that site.
For the sake of a couple more minutes?! I don't think so. Finish the moment at hand for crying out loud. Then make a couple of closing remarks, including the new start time of semi #2. Maybe that takes 3 minutes, tops. Cutting it off prematurely like that was ridiculous and completely amateurish.