The behavior occurs because there are no Quick Add fields defined in the preferred Contact Form. To fix this:
1. Navigate to Customization > Forms > Entry Forms.
2. Click Edit for the preferred Contact Form
3. In the Fields tab > Main subtab, make sure that Quick Add checkbox = T for the following:
4. Click Save
5. Clear the browser's cache
6. Close the browser
7. Re-open the browser and log in to NetSuite
Note: An enhancement has been filed to have the ability to hide the Role Column in the Contact tab of a Customer record, Enhancement # 128597.