Hi! I’ve been noticing that, when getting stats for my ad campaigns, some are delayed by quite awhile – up to 12-hour-old hour blocks are showing new impressions. This is a problem for when we want to show change-over-time.
An example: the tail of the promoted_tweet_timeline_impressions array from the same campaign, viewed 1 hour apart:
Notice the entry at . Even though that hourly block happened 12 hours ago, in the past hour, it somehow acquired 2 new impressions.
How is this possible?