App script tag caching - Getting intermittent 503 error

[lukeclifton]

Hi.

We have an app which implements an app script tag to load a JS file on the storefront.

We have turned catching of the script on however we now get an intermittent 503 "Failed to load resource" error.

If we reload the page, the script then loads correctly. With caching turned off it works ok.

Any ideas whats happening here?