Single table inheritance has child

[CsabaNa]

Hi,
My issue is: I have a table structure like this:

#[ORM\Entity(repositoryClass: PaymentRepository::class)]
#[ORM\InheritanceType('SINGLE_TABLE')]
#[ORM\DiscriminatorColumn(name: 'discriminator', type: 'string')]
#[ORM\DiscriminatorMap([
    'payment' => 'Payment',
    'refund' => 'Refund',
])]
class Payment {...}

#[ORM\Entity(repositoryClass: RefundRepository::class)]
class Refund extends Payment {...}

#[ORM\Entity(repositoryClass: FinancialGroupRepository::class)]
class FinancialGroup {
...
    #[ORM\OneToMany(
        mappedBy: 'financialGroup',
        targetEntity: Payment::class,
        cascade: ['all'],
        orphanRemoval: true
    )]
    protected Collection $paymentEventList;

    #[ORM\OneToMany(
        mappedBy: 'financialGroup',
        targetEntity: Refund::class,
        cascade: ['all'],
        orphanRemoval: true
    )]
    protected Collection $refundEventList;
...
}

The issue is the paymentEventList contains the Refund as well. Perhaps I missed something but I think it should not as the target entity is the Payment.
e.g.:

data would be
| id |  amount | discriminator |
| 1  |  12.01  |    payment    |
| 2  |  10.03  |    refund     |

the $paymentEventList has both record I think it should only have the 1st record
the $refundEventList has only the 2nd record

Why is that or is this a bug?

[mpdude]

The Refund is_a Payment, so it is in that list.