$inv->contains(); doesn't work for custom named items?

My code: (Not really, but the idea of how my code written)

PHP:

$check = Item::get(377, 0, 1)->setCustomName("Anything");
if($inv->contains($check)){
  $this->doStuff();
}


The problem I'm having is after player quit and rejoin, the custom named item is still in inventory but $inv->contains(); doesn't work then, it works when player online and the custom named item added to its inventory. Any help is appreciated.

 

Item::setCustName does not exist.

 

Oh, that's a typo

 

Does the player have more than 1 blaze powder (Item ID: 377) in their hand?

 

@player has 64 Custom named blaze powders, but when relog, none is counted in inventory