@CosmosDBInput ignores partitionKey

In my Micronaut Azure Function I am using a binding @CosmosDBInput for event-sourcing like this:

public class ChatRoomFunction extends AzureFunction {

  @FunctionName("handleCommand")
  public HttpResponseMessage handleCommand(
    @HttpTrigger(
      name = "req",
      methods = HttpMethod.POST,
      authLevel = AuthorizationLevel.ANONYMOUS)
    final HttpRequestMessage<Command> request,
    @CosmosDBInput(
      name = "events",
      connectionStringSetting = CONNECTION_STRING,
      databaseName = DATABASE_NAME,
      collectionName = "events",
      partitionKey = "events--{id}") final List<Event> events,
    final ExecutionContext context
  ) {
     // function body intentionally left out
  }
}

// with

public class Command {
  private UUID id;

  // more fields, getters, setters
}

// and

public class Event {
  private String streamId; // this is the CosmosDB partition key

  // more fields, getters, setters
}

Before, I tried doing this using @TableInput which seemed to worked fine.
Now I've switched to CosmosDB and for some reason it seems to ignore my @CosmosDBInput's partitionKey value.

Expected: events should contain a list of only Events having a certain streamId as matched by the binding parameter of the request body, i.e. id.

Actual: events contains a list of ALL Events present in the events collection.

Am I missing something here? This is what the partitionKey is for, right?

handleCommand の @CosmosDBInput アノテーションから始め、partitionKey の値がリクエストボディからどのように解決されるかを追跡します。events コレクションを使った例を再現し、その後、binding が要求された streamId でフィルタリングするかどうかを確認します。binding が一致するイベントのみを返すか、サポートされる動作を明確に文書化できれば完了です。