Sync Record Type returning inconsistent data

Hi, while querying data using query record type in one specific field (which is an integer type, mostly the values will be 1, 2 or 3) is returning null even the value is present in the database. While using query entity value is returning and in record data preview value is displaying but in the query record type alone it is returning null one time and returning value on clicking test value again. It's a sync record type and there is no sync failure, and no changes were made in database table structure and in CDT. By syncing the record manually this issue is resolved but I want to understand the root cause.

Thanks.