Synchronize table level check constraint

I have defined a table level constraint:

date_id = trunc(date_id)

When I run "Synchronize Data Dictionary with Model", the following DDL is consistently generated:

ALTER TABLE pm_data_mart.dmt_date_dimension DROP CONSTRAINT dmt_date_dimension_ck_1;

ALTER TABLE pm_data_mart.dmt_date_dimension

   ADD CONSTRAINT dmt_date_dimension_ck_1 CHECK ( date_id = trunc(date_id) );

If I run the two statements and then repeat "Synchronize Data Dictionary with Model", I would expect no DDL but the same two statements are generated again.

Why is this happening and how can it be prevented?

PS: Version 21.1.0.092 Running against Oracle 19c database.