Clash Royale CLAN TAG#URR8PPP

magento 2 ignoring completly ignoring addAttributeToSort

This code is working perfectly in MAMP but the moment I move it to Linux it ignore the $category_product->addAttributeToSort('position', 'asc');

It just gives me the array in the default order instead of by position.

$Cats = explode('/',$_SERVER['REQUEST_URI']);
if($Cats[9] == '' && is_numeric($Cats[8]))
$Cats[9] = $Cats[8];

$objectManager = MagentoFrameworkAppObjectManager::getInstance();
$_product = $objectManager->get('MagentoFrameworkRegistry')->registry('current_product');


$productId = $block->getProduct()->getId();
$cat_ids = $block->getProduct()->getCategoryIds();



$product = $objectManager->create('MagentoCatalogModelProduct');


$category = $objectManager->create('MagentoCatalogModelCategory')->load($Cats[9]);


$category_product = $category->getProductCollection();

$category_product->addAttributeToSort('position', 'asc');


$cat_prod_ids = $category_product->getAllIds();

$_pos = array_search($productId, $cat_prod_ids); // get position of current product
$_next_pos = $_pos+1;
$_prev_pos = $_pos-1;

$keys = array_keys($cat_prod_ids);

echo '<pre>';
print_r($cat_prod_ids);
echo '</pre>';


Where am I going wrong with this? I'm racking my brain.

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