[Bug] Copy data activity will missing data when ingest kusto data to database

I using copy data activity to ingest kusto data to sql server databse . and my sotred procedure has
`WHEN NOT MATCHED BY SOURCE THEN DELETE` statement. When the copy data activity compete, I found only 791 rows data in my database, but it should have 60,791 rows data in my databse. I think maybe there are a batch operation in copy data activity, the lastest operation will delete pre data, and I found the batch size is 10,000.

Is there a solution to resolve this issue?