Multiple databases in Editor

It was said that the notation database.table.field would work in Editor, but that's not true.
Thread: https://datatables.net/forums/discussion/74975/multiple-databases-in-a-single-table

The following code:

Editor::inst( $db, 'database1' )
    ->field(
        Field::inst( 'database1.table1.id' ),
        Field::inst( 'database1.table1.name' )
            ->validator( Validate::notEmpty( ValidateOptions::inst()
                ->message( 'Cant be empty' )
            ) ),
        Field::inst( 'database1.table1.entity')
            ->options(
                Options::inst()
                ->table('database2.entities')
                ->value('id')
                ->label('entity_name')
            )
            ->validator(Validate::dbValues()),
        Field::inst( 'database2.entities.entity_name')
    )
    ->leftJoin( 'database2.entities', 'database1.table1.entity', '=', 'database2.entities.id' )
    ->debug(true)
    ->process($_POST)
    ->json();

Will not work. An alert box will be displayed saying "Unknown parameter database2.entities.entity_name".

The db instance is MySQL, and of course it is only connecting to database1 - although the user has privileges to read database2:

$sql_details = array(
     "type" => "Mysql",    // Database type: "Mysql", "Postgres", "Sqlite" or "Sqlserver"
     "user" => MYSQLUSER,    // User name
     "pass" => MYSQLPASSWORD,    // Password
     "host" => MYSQLHOST,    // Database server
     "port" => "3306",    // Database port (can be left empty for default)
     "db"   => MYSQLBANCODEDADOS,    // Database name
     "dsn"  => "charset=utf8"     // PHP DSN extra information. Set as `charset=utf8` if you are using MySQL
 );

Debugging shows the DT_Row object with the database showing as table, and the table showing as a field:

{
  "data": [
    {
      "DT_RowId": "row_1",
      "table1": {
        "id": "1",
        "name": "10/10/2024",
        "entity": null
      },
      "database2": { "entities": { "entity_name": null } }
    }
  ],
  "options": {
  },
  "files": [],
  "debug": [
    {
      "query": "SELECT  `table1`.`id` as 'table1.id', `table1`.`name` as 'table1.name', `table1`.`entity` as 'table1.entity', `database2`.`entities`.`entity` as 'database2.entities.entity' FROM  `table1` LEFT JOIN `database2`.`entities` ON `table1`.`entity` = `database2`.`entities`.`id` ",
      "bindings": []
    },
    {
      "query": "SELECT DISTINCT  `id` as 'id', `entity_name` as 'entity_name' FROM  `database2`.`entities` ",
      "bindings": []
    }
  ]
}

Any ideas?