Sylas Passive Against Yorick Ghouls BUG [GAMEPLAY]

When playing as Sylas, autoing a Yorick Ghoul with a passive-empowered auto will only deal the AOE damage amount, and not kill it. Regular autos will kill ghouls in one hit, at least early game. I think this is due to a bugged interaction with ghouls' AOE damage reduction.

To reproduce, simply have Sylas use a passive-empowered auto on a Yorick ghoul, and it will deal only around 10-20% of its HP, as opposed to the correct 100%.