When ACF saves a field there are two entries created in the database. One has a meta key of your field name with the value to be stored. The second has a meta key = "_{$your_field_name}" that has a value that is the ACF field key. Not sure if this is what you’re referring to.
Exactly what kind of field is this field you’re referring to as a flag? Is it a true false field? or some other type of field?
What do you mean when you say the value is a hashed value? Can you give me a better example? copy & past of the actual value stored?
