Viewing page comparision of a page containing a task list does not render checkbox

Issue Summary

This is reproducible on Data Center: (yes) / (no)

Steps to Reproduce

1. Create a page and add a task list to it.
2. Publish the page.
3. Add any text after the task list, then publish the changes.
4. Go to the "page history" and compare the two versions of the page.

Expected Results

The checkboxes should appear in the page comparison.

Actual Results

The checkboxes in the task list do not appear.

Workaround

View each page instead of the page comparison.