Change Tracking Auto Clean Up SQL Server

How do I know if the Auto Clean Up in Change Tracking in SQL Server worked?

my Database Change Tracking Properties:

Change Tracking: True

Retention Period: 1

Retention Period Units: Minutes

Auto Cleanup: True

I tried querying DML changes for the table using the ChangeTable Function. There are still records returned when I queried using the query below, even the retention period is 1 minute and no DML changes were made.

SQL Query used:

select tc.*,Maint_Hrs.* FROM CHANGETABLE(CHANGES [dbo].[Maint_Contract_Hrs_CDC], null) AS Maint_Hrs
join sys.dm_tran_commit_table tc on Maint_Hrs.sys_change_version = tc.commit_ts