We've been using this shortcode and the associated embedded player for over a year on our site without any issues. Suddenly over the past two days, the player has been randomly choosing to not load. Nothing has changed on our site, and our developer has confirmed that there are no issues with our API call. Here's an example of the shortcode we use, which as I said, has worked for the past year:
[soundcloud params="color=333333&theme_color=00000;" url="https://api.soundcloud.com/tracks/265705359"
; height="166" /]