The lack of a ?nocache=true suffix must have been the problem.
Apparently. Although I don't understand it. Because I did not have the problem either before adding the suffix or after, (refreshing the browser cache in both cases). So the version Cloudflare gave me in the first case must have been OK. But it gave you a faulty version, when you refreshed the browser cache. Can different versions of the same file be simultanously cached on different Cloudflare servers???
Apparently. Although I don't understand it. Because I did not have the problem either before adding the suffix or after, (refreshing the browser cache in both cases). So the version Cloudflare gave me in the first case must have been OK. But it gave you a faulty version, when you refreshed the browser cache. Can different versions of the same file be simultanously cached on different Cloudflare servers???