Adding custom column to Workflow Task content type makes workflow stop on assign task

Question

I have been asking a few questions in here lately, as I'm beggining my journey as a Sharepoint Online 'developer' for my new internship.
I have a new one for today:

I have created a custom approval workflow, and I wanted to collect a comment from the person who will Approve or Reject the task assigned to him/her by the WF.

I have tried adding a new column called Approver Comment, a text column with multiple lines (non-obligatory).

The workflow works, but only until the point where the "Assign task to..." tries to execute. It simply doesn't, but it does if I remove the column I made.
I tried creating a new content type with Workflow Task(Sharepoint 2013) as parent, and with it's own comment column, but the same has happened.

The task was never assigned after the inclusion of the column, I would like to know why is it and how can I get it to work.

And please don't recommend using OOTB workflows.

Answer 1

Three things:

1. If the 'Wait for task completion' checkbox is selected on the task itself, the workflow will pause execution at that point until the task has been completed (approved/rejected).
2. Be sure to select your custom content type in the Outcome Options > Task content type dropdown.
3. Be sure to associate your workflow with the Tasks list that contains your custom content type.

You might find the following article helpful: http://www.jenniferannmason.com/Blog/Post/251/-Office365-and--SharePoint-2013--Creating-Custom-Workflow-Tasks.