Workflow variable is set to empty after the user responded task using Nintex Task Form
The workflow variables that previously had a value are set to empty after the user responded to a task that utilize a Nintex Task Form. The issue will only happen when the Nintex Task Form having the 'workflow variable' as part of the form's control.
Navigate to Nintex Task Form designer.
In the Ribbon bar, click on Form Settings.
Go to Advanced section and set the 'Load realtime workflow data' to Yes.
By default, workflow data will be set and cached in Nintex Form when the task action with is executed. Hence, when the form is loaded, it loads the cached workflow data instead of the real-time data. If the workflow data is updated by the form, the real-time workflow data is overwritten with the updated cached values from the Form.