$ page.excerpt does not update

[chenpercy]

Bug report

Version

1.0.0-alpha.13

Steps to reproduce

1. Modify md
   
2. Check whether $ page.excerpt contains value (in browser console)
   
3. Modify md
   
4. Check whether $ page.excerpt updates or not (in browser console)
   
   However, it's not working.

What is expected?

Edit the content prior to < !-- more -->，and hope $page.excerpt can get the value following updates.

What is actually happening?

If I just modify the content prior to < !-- more -->，$ page.excerpt does not change, but < Content /> still works. If I delete the md content and save it, and then rewrite the content again, $page.excerpt will works。

Other relevant information

• Your OS: macOS
• Node.js version: v8.11.1
• Browser version:
• Is this a global or local install? local
• Which package manager did you use for the install? npm