CloudFront function not executed when response is delivered via HTTP3

Question

I have a CloudFront function that sets the cache control and strict transport security headers. It works when the response is delivered via HTTP1 and 2 but since I enabled HTTP3 both chrome and Firefox report that the headers I was expecting are not present in the response.

Here's my infrastructure as code. Here's the test procedure

Is here the right place to report this bug?

Here's my [infrastructure as code](https://github.com/JaderDias/multi-region-cloudfront-s3-hcl).
Here's the [test procedure](https://medium.com/@jaderd/cloudfront-functions-are-great-when-they-work-ffb642db8412)

Is here the right place to report this bug?

Yury Yakubov · Accepted Answer

In my tests I can see headers being added by CloudFront function even after upgrade to HTTP3, so it requires more deep investigation why it doesn't work for you. I'd suggest to create a Support ticket.
However, I would also suggest to consider using [Response Headers ](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/adding-response-headers.html)
With this feature you don't need to use CloudFront Functions to insert headers such as Cache-Control and Strict-Transport-Security in the response.

CloudFront function not executed when response is delivered via HTTP3

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