Custom CsvBulkLoader gets ignored

Questions
1

Silverstripe Version: 4.4.1

Question: Why gets my custom CsvBulkLoader ignored?

Hi there.

I’m trying to use a custom CsvBulkLoader and it gets ignored and I don’t know why. It did work before, but the client came up last week that it does not work anymore. The function is used very rarely.

That’s my code in digests (ESC ist the client’s name):

class EscAdmin extends ModelAdmin {
	private static $managed_models = [
		EscResult::class => ['title' => 'Results']
	]
	private static $model_importers = [
		EscResult::class => EscResultsCsvBulkLoader::class
	]
}
class EscResultsCsvBulkLoader extends EscCsvBulkLoader
{
	public $columnMap = [
		'Number' => 'Number',
		'PlaceStart' => 'PlaceStart',
		'PlaceFinish' => 'PlaceFinish'
	];
}
class EscCsvBulkLoader extends CsvBulkLoader
{
	public $delimiter = ';';
}

I think this is pretty straight forward or did I miss a detail?

Thanks in advance.

Best, Mario