invalid path resolution in multi-root workspace

i have a multi-root workspace with the following configuration

{
  "folders": [
    {
      "path": "fondamentaux-guide"
    },
    {
      "path": "fondamentaux-code"
    }
  ],
  "settings": {
    "xml.trace.server": "messages",
    "xml.java.home": "/usr/lib/jvm/default-runtime",
    "xml.catalogs": [
      "fondamentaux-code/path/to/catalog.xml"
    ]
  }
}

The path to the catalog is resolved to 'file:///path/to/workspace/fondamentaux-guide/fondamentaux-code/path/to/catalog.xml' (note the /fondamentaux-guide/fondamentaux-code/ part) while it should be resolved to 'file:///path/to/workspace/fondamentaux-code/path/to/catalog.xml'

Reproduce the issue with the multi-root workspace configuration and the relative xml.catalogs path shown in the report. Trace the extension's catalog path resolution entry point and verify that the catalog resolves relative to the folder named in the path; done means the URI points to fondamentaux-code/path/to/catalog.xml rather than nesting it under fondamentaux-guide.