Preventing Heroku from using precompiled assets in development mode

Question

Currently it seems Heroku is determined to pre-compile assets when I push my code up to my instances.

This is great for production servers, however for my "RAILS_ENV=development" server, this causes issues, as I now get pages with all the JavaScript files served up individually from my asset manifest, and then another file with the same code all grouped up as the pre-compiled asset.

This cause my jquery datatables libraries to break, throwing popup errors, which I don't get on my local environment (development or production) or in my production Heroku instance.

Is there anyway to disable pre-compilation of assets on Heroku for development mode instances ? Or is there any reason why these aren't already disabled on development Heroku servers already ?