Unity Analytics events are taking longer than 72h to appear.

I released a game Wednesday, and the first day's analytics events showed up 24 hours later (about 20 users, matching 20 events). Since then another 300 people have played the game, but only 4 or so events have shown up. So, it's been over 3 days since any new events have appeared.

Is this common and I'll have 200 or so events hit later this week? Or am I losing all this data and need to contact someone at Unity?