In what situations would it be advisable to seek help from the plugin or theme manufacturer when facing PHP customization issues in Woocommerce?

When facing PHP customization issues in Woocommerce, it would be advisable to seek help from the plugin or theme manufacturer if the issue is related to compatibility with their product or if the customization involves modifying core functionality that could potentially break the plugin or theme.

// Example PHP code snippet for fixing an incompatibility issue with a Woocommerce plugin
add_filter( 'woocommerce_product_tabs', 'custom_product_tab' );
function custom_product_tab( $tabs ) {
    // Add custom tab logic here
    return $tabs;
}