Well, let us explain further. It's because the setting sun is in the batsman's eye from this particular end. However, this phenomenon is a common occurrence at Napier. This happened in a Super Smash fixture earlier this season too.
The umpires are saying that the setting sun is in the eyes of the players and that they need to think of the safety of the players. They've also confirmed that the players didn't appeal even though they were 'aware of the situation'.
©Duta