Hey there! We've found the following might help you get unblocked faster:

• 🧵 I need to add a custom domain without CNAME set.

• 🧵 Connection refused when service sends requests to sleeping service through private network until woken up

• 🧵 502 Error On Sleepy Apps

If you find the answer from one of these, please let us know by solving the thread!

Do subsequent requests work or this is for all request?

this happens when the function is sleeping. The first request going to a sleeping function gives that error, and then the next ones work well.

If the function does not wake up within 10 seconds you will see errors.

but it wakes up automatically when it is called, so why the errors?

It could return an error on first start.

This isn't ideal, any solution to this or a workaround?

this makes it very unreliable because of the failing start request

I'm sorry, but your application returning an error would be out of our control.