Steps to reproduce the issue

Create a new Field Group
Create a new Field and assign it to one or more categories and assign it to the Field Group you made in step 1.
Set the Field Automatic Display to Under Title
Go to an article in the 3.7 demo such as First Blog Post and fill in the field with some content and save the article
Now view the article on the front end. It should be at something like:

http://yourdomain/joomla-cms/index.php/article-category-blog/17-first-blog-post
or use the "All Front End Views" side bar and click "Article Category Blog" and then click on First Blog Post.

Expected result

You should see the custom field content under the article title

Actual result

Custom field content does not appear under the title.

System information (as much as possible)

Running 3.7 alpha 1 on Mamp and php 7.0.10

Additional comments

If you make the field appear Before Display or After Display, it DOES appear, just not under the title.