Custom payroll flow task sequence option not working

Summary:

Created the Payroll custom flow and added multiple standard and custom reports. 

We are expected to execute and display the sequence provided, but is not displayed as per the requirement. 

Content (required):

We have created custom payroll flow which has multiple standard reports, processes and some custom reports as well.

Sequence is not working as expected, we have tried all possible options but to no avail.

Has anyone faced this issue and how this has been resolved, please suggest.

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Code Snippet (add any code snippets that support your topic, if applicable):