No clue. MSNBC seems really bothered and surprised by it.
Part of the issue is they are reporting three separate results for the first time.
New numbers:
Mayor Pete 1532 27.1%
Bernie 1516 26.8%
Liz 1332 23.5%
Biden 693 12.2%
Klobuchar 581 10.3%
Newer numbers:
Bernie 1811 28.3%
Liz 1636 25.5%
Mayor Pete 1532 23.9%
Klobuchar 724 11.3%
Biden 693 10.8%
Even newer numbers!
Bernie 1811 27.8
Liz 1636 25.2%
Mayor Pete 1553 23.9%
Klobuchar 773 11.9%
Biden 722 11.1%