Child service page title changes not reflected on parent service sub-landing page

[msayoung]

When editing the title of a service page that is a child of a sub-landing page, the changes are not properly reflected on the parent sub-landing page. The child page displays with the old title and missing summary information.
Steps to Reproduce

1. Create a sub-landing page
2. Create a service page
3. Add the service page as a child to the sub-landing page (using drag and drop)
4. Save the sub-landing page
5. Edit the service page title
6. Save the service page
7. Navigate back to the sub-landing page

Expected Behavior
The child service page should display on the sub-landing page with:

The updated title
The summary/description intact

Actual Behavior
The child service page appears on the sub-landing page with:

The old/unchanged title
Missing summary/description

More context: this only happens when you use the "Pages linking here" drag and drop widget. If you search for the content using the entity reference field the problem does not occur.

I also notice that once you've updated the title of the service page , you also see the page suggested again, even if its already linked.

None of these problems seem to affect Service landing pages.