Batch Update of Activities: Allow Details field to be batch updated

See https://civicrm.stackexchange.com/questions/18075/update-multiple-activities-cannot-display-details-field

We'd like to be able to update multiple Activities easily and prepare a Profile to activate these fields:

• Activity Date
• Time
• Activity Status
• Subject
• Details
• Duration

On applying Batch Update to selected records, all works as expected except for the Details field which, while containing the Copy icon at the top of the column, does not display the fields for each row. Instead the column is blank.

Thinking this may be an issue since Details is a text field, we tried adding and activating a Custom text field called Scratchpad. When added to the profile, this custom field displays (and can be batch updated) as expected.

We use WordPress 4.7.3 and also tested on latest demo sites (WordPress and Drupal) with same results. We therefore think this may be a bug.