Nothing unusual in the big flat valley you outlined. That simply shows that they don't post loans at night. 6PM pacific time is last feeding. On that chart, the 6PM feeding is shown at 2100 eastern time.
Perhaps your comment was about the big decline from 2100 to 0000 ? Looks like over 300 loans finished during that time. The average loan sitting in inventory is about half funded, so that may have been about $2.5 Million.