Google Analytics lowercase filter for Campaign Term did not change my data. Why?

Universal Analytics sent a notification "Property XXXX is receiving hits with utm_term parameters of the same text but different letter cases" (e.g. MY term, my term, My Term) and proposed to set up a lowercase filter for Campaign Term, which I did.

lowercase filter Campaign Term

After one week, the Keyword column in Paid Keyword view keeps showing a couple of lines with mixed cases.

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Moreover, if in the All Campaigns you select Keyword as a Primary Dimension it shows many more mixed cases words that came from some non-paid campaigns

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I checked actual URLs in BigQuery. All these words that appear in the Keyword column do come as utm_term parameters.

Why did not Campaign Term lowercase filter change my data?