Embeds do not work if there is additional content

[kwonye]

When a post has a embed-supported url with additional content, the embed does not show.

Post with only embed url: https://dubkwon.wordpress.com/2017/02/20/testios/

Post with embed url + additional content: https://dubkwon.wordpress.com/2017/02/20/testungff/

This worked on the previous editor