Missing property sources in Spring Cloud Config Server with S3 Backend - spring

Question

We are trying to migrate our Spring Cloud Config Server from a Git Backend to S3.
With git when we want to get config for the service my-service and profile development we hit
https://my-config-server/my-service/development
and this returns something like
{
"name": "my-service",
"profiles": [
"development"
],
"label": null,
"version": "fgdfgdfg",
"state": null,
"propertySources": [
{
"name": "https://bitbucket.org/company/config-repo.git/my-service-development.yml",
"source": {
[properties]
}
},
{
"name": "https://bitbucket.org/company/config-repo.git/application-development.yml",
"source": {
[properties]
}
},
{
"name": "https://bitbucket.org/company/config-repo.git/my-service.yml",
"source": {
[properties]
}
},
{
"name": "https://bitbucket.org/company/config-repo.git/application.yml",
"source": {
[properties]
}
}
]
}
And we have the files my-service-development.yml, application-development.yml, my-service.yml and application.yml so that properties in the more specific ones override properties in the more general ones.
Eg we can set a property in my-service.yml but override it for the development environment in my-service-development.yml. Likewise we can set common properties for an environment (such as database connections or messaging connections in application-development.yml.
However when we switch to S3 and hit the same URL we only get
{
"name": "my-service",
"profiles": [
"development"
],
"label": null,
"version": "twtwert",
"state": null,
"propertySources": [
{
"name": "s3:my-service-development",
"source": {
[properties]
}
}
]
}
ie we only get the most specific property source and not the others.
Is there something we are missing or is this a bug in the S3 implementation?
We are using spring boot 2.5.4, spring cloud 2020.0.3 and spring-cloud-aws 2.3.2