Strange bug (sync)

Hi,

Would you let us know the webpage url where this is happening so that we can check what’s wrong?

Yes, of course – LINK / LINK 2

This is not our plugin’s functionality. You are using some other plugin that is responsible for this.

With all plugins deactivated, the bug is still there.

Some other plugin that you might have used and deleted before, has saved the Facebook comments in WordPress database which are appearing as default comments. You can check if this still happens even after deactivating our plugin.