Woocommerce qty increment buttons problem

Yes.
But that’s not the point.
When the qty field is visible(number type), the increment buttons should be visible.
When the qty field is invisible(hidden type), the increment buttons should be invisible.
That’s what it is.
The type of qty field is managed by Woo, GP should follow that.

I’m using my own code via woocommerce_quantity_input_max hook to control max qty.
Because some of products shouldn’t be added more than 1 to the cart.

If I turn off this code, off course no problem.
Both the qty field and the increment buttons are visible.

The code has been working for years. should be no bug.
It returns 1.

function mywc_quantity_input_max($max,$product){
  $pid = $product->get_id(); $max = 1;
  if($pid == 49 || $pid == 50) { $max = 2; }
  elseif($pid == 88){ $max = 10; }
  return $max;
}
add_filter('woocommerce_quantity_input_max','mywc_quantity_input_max',10,2);