Can't subclass from perl5 package

[DarthGandalf]

use lib:from<Perl5> '../libp5/lib/perl5';
use AI::Pathfinding::AStar:from<Perl5>;

class MyStar is AI::Pathfinding::AStar {
	method getSurrounding {
	}
}

my $map = MyStar.new;
my $path = $map.findPath(1, 2);

Can't locate object method "doAStar" via package "MyStar" at ../libp5/lib/perl5/AI/Pathfinding/AStar.pm line 102.

doAStar is called internally by findPath, and it exists in the package AI::Pathfinding::AStar

Perhaps generation of @ISA doesn't work properly?

Environment: Gentoo Linux, Rakudo v2023.10.