it should not be breaking any more because the issue was with keyword linking addon that was trying to auto link
Spotify keyword in the embed code.
never mind. it should be fine now. i had enabled it to file the bug report.
and since the code was being changed on the fly, it fixed existing embeds as well it seems.
so i am going to turn the keyword on while i get a response from the developer of the addon which is causing this problem. so the embed code would break for now.