Why does Yii::createObject($user) create the wrong object?

Question

Yii

actually like this

$user='common\modules\Main\Entities\User';
var_dump(\Yii::createObject($user));

get

object(common\modules\Company\Services\CompanyService)#181 (1) {
["repository":"common\modules\Company\Services\CompanyService":private]=>
object(common\modules\Company\Repositories\CompanyRepository )#182 (0) { }
}

why? And most importantly, how to calculate where the error can not breakpoints on xdebug do not display the whole picture.