Unable to assign approval group for transactions & role-based approval results in force approval

In Oracle Fusion -Accounts Receivable, while configuring, two key issues are faced with the User-based and Role-based approvals in the new Receivables Transaction Review and Control feature:

User-based approvals – Transactions cannot be routed to an approval group (a group of users).
Role-based approvals – Transactions are being force-approved instead of routing to the appropriate approver.