Multiple classifier in dependency variant

Hi,

I have a project A whose compilation leads to 2 JARS :

  1. A jar without classifier
  2. A jar with the classifier API containing only tha API classes

On my project B, I use the java feature for defining variant according sourceset (as described on https://docs.gradle.org/current/userguide/feature_variants.html#sec:feature_variant_source_set)
Feature associated with a capability

in dependencies.gradle, I define

dependencies {
   [sourceSet]Api [GAV of A, classifier API]
   [sourceSet]Implementation [GAV of A]
}

This project B artifact is published on Maven Artifactory server.
On the .module file published, I can clearly see both dependencies for runtime variant

  "variants": [
    {
      "name": "cmatsRuntimeElements",
      "attributes": {
        "org.gradle.category": "library",
        "org.gradle.dependency.bundling": "external",
        "org.gradle.jvm.version": 8,
        "org.gradle.libraryelements": "jar",
        "org.gradle.usage": "java-runtime"
      },
      "dependencies": [
        {
          "group": "group",
          "module": "module",
          "version": {
            "requires": "version"
          },
          "thirdPartyCompatibility": {
            "artifactSelector": {
              "name": "module",
              "type": "jar",
              "extension": "jar",
              "classifier": "api"
            }
          }
        },
        {
          "group": "group",
          "module": "module",
          "version": {
            "requires": "version"
          }
        },
    "capabilities": [
    {
      "group": "program",
      "name": "pgrm",
      "version": "2.4.1.R1.001"
    }
  ]

On a project C, I define a dependency on this variant with

dependencies {
    implementation ("group:module:version") {
        capabilities {
            requireCapability("program:pgrm:2.4.1.R1.001")
        }
    }
}

In the runtimeClasspath dependency resolution, I expected to have both A.jar and A-api.jar but I only have A-api.jar. Why ? Is something wrong in my configuration ?