Produce message validation fails for valid JSON schema with a reference

[Haarolean]

1. Create a schema "test-key":

{
  "$schema": "http://json-schema.org/draft-07/schema",
  "$id": "https://example.com/A.json",
  "title": "A",
  "description": "A",
  "type": "object",
  "properties": {
    "a": {
      "type": "number"
    }
  },
  "required": [
    "a"
  ]
}

2. Create topic "test"
3. Produce a message into the topic
4. Observe an error: