This is already happening few times to us.

Approval Task redirects to SharePoint Task item page instead of ApproveReject page, this suddenly happening to one of workflows which has a Request Approval module.

I across some solutions posted 2 years and 6 years ago:

https://community.nintex.com/nintex-for-sharepoint-67/task-approval-redirects-to-sharepoint-task-item-instead-of-approvereject-aspx-page-16765

https://community.nintex.com/archive-25/why-would-request-approval-step-not-redirect-to-approvereject-aspx-page-56867

So has this already been fixed with any specific patching? Or any simpler solution or best practice has been advised by Nintex? 

Thanks.