PrivacyBadger is a bit more aggressive in blocking CDNs than uMatrix/Ghostery/uBlock Origin because it's more than just an ad blocker: it's meant for privacy across the board.

According to https://github.com/EFForg/privacybadger/issues/746 CDNs are often blocked because they set localstore/cookies and do some stuff that might look like canvas fingerprinting. I would update your privacybadger, if you haven't. It might have been fixed.