Broke CSS

I am running the paid version of Jetpack Boost and upgraded to 3.6.1, which broke the CSS on my site. The issues remained even after clearing all cache, turning off all settings in Jetpack Boost, and disabling the plugin itself.
I restored my site to its previous state before the upgrade, which included Jetpack Boost 3.6.0, and everything was working correctly again.
I disabled all Jetpack Boost options and then upgraded to 3.6.1, which broke the site’s CSS again, even with all settings disabled.
I enabled all the Jetpack Boost settings as suggested by the support engine, but the issue was not resolved. I had to restore it to its previous state so the site would present and work correctly.

Bottom line: 3.6.1 broke CSS.