We should verify continued functionality of plugins that use the FileWillBeUploaded hook, e.g. the antivirus plugin.
What’s fascinating is that the io.Copy did /not/ fail, so there may indeed be a root issue with the framework to uncover here.
Do you know how urgent this is? It missed code complete, do you think this can be safely moved to v5.16?
Safe to defer.
Flaky test has been resolved.