CORS problem automatically reset itself [Heroku hosted]

[jeffreystables]

Just so everyone knows, Heroku doesn’t support persistence of these settings when made only on the server-side. You should apply your settings and then push to Heroku. From this thread:

@billappleton

You need to create and configure your app on a local desktop install and then push that to Heroku. If you set up CORS from the admin console running on Heroku then the config file will not be persistent.