In DAX, nesting measures while overwriting filters can cause unexpected results. When a measure applies a filter, it replaces any existing filter on that column. For example, a measure filtering for "Black" and "White" will ignore row-level color filters and return the sum of both.

Using KEEPFILTERS() can preserve distinct values but may lead to conflicts when nesting. If a nested measure retains a filter and the outer measure adds another, the result can be empty. Two solutions exist: writing separate measures with independent filters or using a User-Defined Function (UDF) to handle the logic.

This article demonstrates the issue with Online Sales data for Germany and colors Black, White, and Green, showing how to achieve correct results by avoiding nested filter conflicts.