SYMPTOM:
In Strategy Analytics Enterprise Web 9.4.1 Visual Insight, when sorting null values from a data import, they will always appear at the top of the grid even when sorting descending, like shown below.

When sorting descending, the expectation should be to sort them to the bottom of the grid.
STEPS TO REPRODUCE:
CAUSE:
This is a known issue with Strategy Analytics Enterprise Visual Insight 9.4.1.
ACTION:
Strategy will continue to investigate and post updates as soon as they are available.
WORKAROUND:
This issue only occurs when nulls are blank cells. If NULL is keyed into each blank cell, the issue will not occur.