Serving large files locally (JS bundles) on windows machines in flask sometimes doesn't work

[chriddyp]

See #46 (comment) for more context

[gvwilson]

Hi - this issue has been sitting for a while, so as part of our effort to tidy up our public repositories I'm going to close it. If it's still a concern, we'd be grateful if you could open a new issue (with a short reproducible example if appropriate) so that we can add it to our stack. Cheers - @gvwilson