Keyword performance report through API is missing data

For some reason the keyword performance report I downloaded through API is missing certain campaigns' data comparing to UI number.

There's no filter applied to keyword performance report download, we did toggled between   IsNegative = false to IsNegative IN [true, false] , but both pull are missing data.

Can anyone advise me why? How to pull the entire campaign report with keyword level of detail?

Thanks!

Aroma

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