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Found the issue in a complicated measure and then tested with only CountRows() along with a Calculate(). When I change slicer selections CountRows() always showed the result of the whole table but Calculate() gave the filtered table.
TopN() has same issue.
@harryhhj , hope you are using
CountRows(table)
refer for TOPN
TOPN: https://youtu.be/QIVEFp-QiOk
TOPN with Numeric Parameter -https://youtu.be/cN8AO3_vmlY?t=26448
Thanks Amitchandak, what I found in my testing is calculate(distinctcount(topN(allexcept(table, column1))) didn't respond to slicers on column1 correctly. I didn't test more but feel that many functions don't work correctly with filter context (very likely a bug).
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