A bug with linking Facebook accounts

I found a bug where your account can be unintentionally unlinked from your facebook account.

If you have two league of legends accounts linked with the same facebook, unlinking one of these accounts will unlink the other one, with no warning this has happened.

To recreate this bug link one LoL account with your Facebook logout and log into the new LoL account Link this account to the same Facebook account Unlink this account from the facebook account Now when you log back into the other LoL account it will also be unlinked from your Facebook account

This cost me the free champion so I hope something is done about this issue.