Issue
When clicking on a task link from a mobile device the task may open up in a browser depending on associations on the device.
If the task opens in a browser a SharePoint task form will be presented in either View or Edit mode regardless if a Nintex Responsive form has been added to the task or the appropriate layout has been added to a Nintex classic Form.
If the task opens in a browser a SharePoint task form will be presented in either View or Edit mode regardless if a Nintex Responsive form has been added to the task or the appropriate layout has been added to a Nintex classic Form.
Resolution
The SharePoint Task form showing is not a bug but a limitation.
Additional Information
A workaround for this issue is to insert a custom link in the email notification.
Click "Link" from the Insert tab ribbon and add a custom link as per the example below.
Click "Link" from the Insert tab ribbon and add a custom link as per the example below.
fn-Replace("{Common:ApprovalUrl}", "Lists/Workflow%20Tasks", "_layouts/15/NintexForms/Mobile")&List=<TaskListId>
Note: Change Workflow%20Tasks to your Task Name and <TaskListId> to your task list id GUID.
The idea for this approach is to use Approval Url which is similar to <SiteURL>/Lists/Workflow%20Tasks/EditForm.aspx?ID=<TaskID>, and replace Lists/Workflow%20Tasks to _layouts/15/NintexForms/Mobile path, to redirect users to the Nintex Form.
Related Links
Work Around based on the following Nintex community thread : Re: CSS - Nintex Style