How to upgrade a Nintex for Office 365 workflow to Nintex Workflow Cloud that has Assign a task action forms that use SharePoint task Comments fields to capture comments from assignees. For more information on upgrading other aspects of task forms, you can review the article, Upgrade forms in the Assign a task action.
If you have a Nintex for Office 365 workflow that has a multi-stage design using multiple Assign a task actions and you want to pass comments from earlier approval stages to later approval stages, you will need to reconfigure how comments work on your forms due to the SharePoint Comment task column losing support. The following example shows how to reconfigure comments for a Leave Request workflow that has both Manager and HR Approval tasks. The manager's comments are carried through to the HR task form.