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

Question

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.

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

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

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?

Answer 1

Actually, the filter is working. It took 5 days, not 24-48 hours as Google usually says, for it to be effective. In my original explanation, I made a mistake. I did check the filter one week later after I set it up, but I checked data of 2-3 days after the setup, not after 7 days.

It's more complicated. I just found an interesting fact. On Aug 12 I checked Paid Keywords of Aug 5-11. There were 2 lines with upper case. Now I checked the same time period Aug 5-11 -- all Keywords are in lowercase! It means the filter has been slowly working. and GA was showing the current progress