Category Not Recorded in Orders

[bret-BSA]

Magento 2.4 ECE
PHP 7.4

activecampaign/module-integration/Order/Model/OrderData/OrderDataSend.php

        $quoteItemsData[] = [
            "externalid" => $quoteItem->getItemId(),
            "name" => $quoteItem->getName(),
            "price" => $this->coreHelper->priceToCents($quoteItem->getPrice()),
            "quantity" => $quoteItem->getQty(),
            "category" => implode(', ', $product->getCategoryIds()),
            "sku" => $quoteItem->getSku(),
            "description" => $quoteItem->getDescription(),
            "imageUrl" => $imageUrl,
            "productUrl" => $product->getProductUrl()
        ];

SHOULD BE:

        $quoteItemsData[] = [
            "externalid" => $quoteItem->getItemId(),
            "name" => $quoteItem->getName(),
            "price" => $this->coreHelper->priceToCents($quoteItem->getPrice()),
            "quantity" => $quoteItem->getQty(),
            "category" => $product->getCategoryDisplayString(),
            "sku" => $quoteItem->getSku(),
            "description" => $quoteItem->getDescription(),
            "imageUrl" => $imageUrl,
            "productUrl" => $product->getProductUrl()