Why is the table name not converted to lowercase?

Question

Yii

Why is the table name not converted to lowercase?

Database Exception – yii\db\Exception

SQLSTATE[42S02]: Base table or view not found: 1146 Table 'psy.Specialists' doesn't exist
The SQL being executed was: SELECT * FROM `Specialists`
Error Info: Array
(
    [0] => 42S02
    [1] => 1146
    [2] => Table 'psy.Specialists' doesn't exist
)
↵
Caused by: PDOException

SQLSTATE[42S02]: Base table or view not found: 1146 Table 'psy.Specialists' doesn't exist

in /var/www/html/psy/vendor/yiisoft/yii2/db/Command.php at line 915