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Exclusion Filter Adds Data o_O

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# 1
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Dear Community,

 

I got a website with 2 hostnames and 3 languages and created a Custom Dimension "Language Version" that says the following:

 

CASE WHEN REGEXP_MATCH(Page, "domain.de.*") THEN "DE" WHEN REGEXP_MATCH(Page, "domain.com/en.*" ) THEN "EN" WHEN REGEXP_MATCH(Page, "domain.com/cn.*" ) THEN "CN" ELSE "Other" END

 

As far as I can see, everything works as expected, with one exception: Taking the metric "Users", applying a filter that says "Exclude Language Version equals CN", it ADDS a significant amount to that number (~ 17%).

 

If I turn the filter to "Include", it works properly.

 

I think that's very wired and just wanted to drop that here, as I am very concerned about data quality and haven't found another way to report Data Studio bugs (as long as it is not me)...


Best regards,

 

Malte