First, make sure your CDN is up and running. While in panic mode, I messed around with mine and inadvertently changed a setting, which caused it to be in "In progress" status instead of "Ready".
You can do a test by going into your wp-admin >> Performance >> CDN >> Configuration >> Test.
Once the test passes, go back to Performance >> General settings >> Debug >> tick the "Content Delivery Network" box >> save.
When I turned mine on, I looked at the source code on the frontend (you have to do this on a different browser where you're not logged in), and saw that CDN was rejected by user agent.
Go to Performance >> CDN >> "Rejected user agents:" >> make sure it doesn't block anything funky. I wiped that list out and it started working for me.
I remember putting Google crawler's user agent onto that list, but I'm not sure what else I had on there that made it not work. Again, while in panic mode, I cleared the list and things were back to the way they were.
Hope that helps.