Can't get open graph to work

Hello everyone!

I am not totally sure where the problem come from, it might not even be related to codeigniter but maybe one of you guys know the answer?

I added the open graph tags to my homepage, however when i check the og tag from the facebook website, the url is followed by a curisou Hash.

So if my website is www.test.com

In open Graph debugger it display www.test.com/YfeMX/

I am using codeigniter is a very basic way, not doing fancy stuffs.
Also to get rid of the url with index in it i use this.

RewriteEngine on
RewriteCond $1 !^(index\.php|bootstrap-3\.3\.2-dist|font-awesome|download|common|images|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

Could any of these be the reason why i get an Hash at the end of my url?

Thank you in advance for any answer.

best regards,

J