Browser: Firefox
When clicking anywhere in the Facebook page iframe, it automatically opens up a new tab that links to the Facebook page. I’m sure this is not what is supposed to happen, and it makes it annoying when a video is clicked on, as the video will still play in the website tab, but the browser will be focused on the new Facebook page tab.
To replicate, add the Facebook Page element, and then click anywhere on it, in the canvas or on the published webpage.