I'm running into a weird issue with Heroku. When I run my application locally it fetches all my requests under 1 second but on Heroku, I get h12/503 errors because it is taking 30 seconds which results in timeout errors. I understand the dev environment is different from production but I can't debug errors I can't reproduce. Do I have to upgrade my Heroku? because I don't really want to do that. Is there a way to fix this?