@QiuMM thank you for the explanation. Now I got it. But, I'm afraid that it can introduce another issue. The purpose of load/drop rule is to control data retention which means how many data historicals should store locally. And as @gianm said, this problem mostly happens in stream ingestion which data size grows as time goes by. If dropRule works based on a fixed date, people might update the date for the dropRule periodically.
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