edit : this happens with any fetch request to other service from my backend !

R2 not working
Stripe not working

Can you tell me a bit more about your stack?

If I understand you correctly
backend: express
frontend: nextjs

When doing any fetch request from my express to my frontend (which is in the same service), the request goes normally.
However, any third-party request from my Express app when static IP is enabled throws a timeout error.

I'm having similar issues with my apps unable to connect to MongoDB when static IP's are enabled. Works fine with Static IP's disabled.

Hello! There was a bug that affected containers on certain host machines on our side. I've just implemented a patch - could you confirm this is working for you now?

now its not working at all
it goes back to the prev error of Application failed to respond

Please try re-deploying your service. The host machine you just got placed on was not yet up to date with our latest build, apologies.

working fine now !