How to check for internal account usage?

Question

1C-Bitrix

It is necessary to perform an action when using an internal account in an order. I catch the order recalculation

event , and when it comes to checking, mysticism begins.

foreach ($paymentCollection as $item) {
        var_dump($item->isInner());
    }

Returns false, but if we add exit

foreach ($paymentCollection as $item) {
        var_dump($item->isInner());
       exit;
    }

Returns true. And accordingly, it is impossible to check for initialization of the internal. accounts.

What can be wrong?