Class scanning order affects constant resolution

[muglug]

<?php
class Mapper {
    public const MAP = [
        Foo::class => self::A,
        Bar::class => self::E,
    ];

    public const A1 = 'A1';

    private const A = [
        self::A1,
    ];

    public const E1 = 'E1';

    private const E = [
        self::E1,
    ];
}

abstract class Base {
    public static function getValidAccountTypes(): array {
        return Mapper::MAP[static::class] ?? [];
    }
}

class Foo extends Base {}
class Bar extends Base {}

Expected: no issue
Actual: return type cannot be inferred