Resources (images, css) gets 304 sometimes


We’re having a couple of properties using Cloudflare and came across this issue with images (and now recently, also a css-file).

We noticed some images are not shown on the site. Upon inspection it turns out they get a 304 status when fetched.

E.g this:
https_:// (added https_ to avoid the image to render)

Sometimes this seems to be a problem only on one client, other times multiple clients have the same issue.

Adding a querystring to the url fixes it. Eg:

My understanding is 304 means that the resource is not modified, and thus doesn’t have to be fetched. But if that’s the case, then Cloudflare must have at some point cached a non-existing/empty file. Could that be managed somehow?

Any suggestions on what could be done to solve this?

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