Unable to add column to Custom List with Deep Export app

Document ID : KB000121235
Last Modified Date : 15/11/2018
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While using custom app "Custom List with Deep Export". The user unable to add the column of "Actuals (Task)". The option appears in the drop-down but when user select it and then hit "Apply" the column does not appear in the page. When you check the drop-down again, the selection is gone. 
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Need to go to workspace field setting page to change User story's Actuals field as visible.
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Then you could see the Actuals option is showing Actuals(User story, Tasks), select it and click the apply button, you should see the Actuals column in Custom List with Deep Export app this time.
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