Cloudflare has resolved the delays with single-file cache purges and it has resumed normal operation.
Posted May 13, 2019 - 06:52 UTC
Cloudflare is experiencing delays processing single-file cache purges. We are actively working to eliminate these delays. In the meantime, you may use the "Purge All" feature, but note that this may cause a surge in traffic to your origin site.
Posted May 13, 2019 - 06:15 UTC
This incident affected: Cloudflare Sites and Services (CDN Cache Purge).