RewriteRule in .htaccess for AngularJS prerendered posts

following this tutorial I'm trying to establish a rewrite rule for social bots in .htaccess, so my prerendered Angular SPA posts can be posted on social networks.

Prerendered posts seem to work fine:

http://ift.tt/1zxFeHz

However, the Facebook debugger still doesn't receive proper data from actual post link:

http://ift.tt/1cLGzpt

My .htaccess code:

ErrorDocument 404 /index.php
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]    
RewriteCond %{HTTP_USER_AGENT} (Facebot|Twitterbot|Pinterest|Google.*snippet)
RewriteRule service/(\d*) http://ift.tt/1zxFeHB [P]    
</IfModule>

Would appreciate any suggestions in modifying the file.