No option to set enrolment durations for cohort sync/enrol cohort in a course

As admin create a course, a cohort, and a user. Go to a course and add a new cohort enrolment method in Course menu -> More -> Users -> Enrolment methods Choose "Add method" = "Cohort sync", an existing cohort and Enabled "Enrolment duration" = "10 days". Click in Add method Check clicking in created enrolment method 'Edit' icon you cannot change enrol period for an existing method.  Go to Site administration -> Users -> Accounts -> Cohorts and click on used cohort's 'Assign' button.  Add a user to the cohort. Go to Course -> Course menu -> User -> Enrolled users and checked the added user is enrolled and active.  Check clicking in  icon button Enrolment starts = Today and Enrolment ends = 10 days after today. Go to Site administration -> Users -> Accounts -> Cohorts and click on used cohort's 'Assign' button.  Go to the course and add a new cohort enrolment method in Course menu -> More -> Users -> Enrolment methods. Remove just created enrolment method instance. Choose "Add method" = "Cohort sync", an existing cohort and Enabled "Start date" = today. Click in Add method Check clicking in created enrolment method 'Edit' icon you cannot change star date for an existing method.  Go to Course -> Course menu -> User -> Enrolled users and checked the added user is enrolled and active.  Check clicking in  icon button Enrolment starts = today. Go to the course and add a new cohort enrolment method in Course menu -> More -> Users -> Enrolment methods Remove just created enrolment method instance. Choose "Add method" = "Cohort sync", an existing cohort and Enabled "Start date" = tomorrow. Click in Add method Check clicking in created enrolment method 'Edit' icon you cannot change star date for an existing method.  Go to Course -> Course menu -> User -> Enrolled users and checked the added user is enrolled but not active.  Check clicking in  icon button Enrolment starts = tomorrow. Go to the course and add a new cohort enrolment method in Course menu -> More -> Users -> Enrolment methods Remove just created enrolment method instance. Choose "Add method" = "Cohort sync", an existing cohort and Enabled "End date" = tomorrow. Click in Add method Check clicking in created enrolment method 'Edit' icon you cannot change end date for an existing method.  Go to Course -> Course menu -> User -> Enrolled users and checked the added user is enrolled and active.  Check clicking in  icon button Enrolment ends = tomorrow. Choose "Add method" = "Cohort sync", an existing cohort and Enabled "End date" = yesterday. Remove just created enrolment method instance. Choose "Add method" = "Cohort sync", an existing cohort and Enabled "End date" = yesterday. Click in Add method. Check clicking in created enrolment method 'Edit' icon you cannot change end date for an existing method.  Go to Course -> Course menu -> User -> Enrolled users and checked the added user is enrolled but not active.  Check clicking in  icon button Enrolment ends = yesterday. Remove just created enrolment method instance. Choose "Add method" = "Cohort sync", an existing cohort and Enabled "Start date" = yesterday and "End date" = tomorrow. Click in Add method. Check clicking in created enrolment method 'Edit' icon you cannot change start date or end date for an existing method.  Go to Course -> Course menu -> User -> Enrolled users and checked the added user is enrolled and active.  Check clicking in  icon button Enrolment starts = yesterday and Enrolment ends = tomorrow.