Bad conversion from SVG to PNG

[roughnecks]

ImageMagick version

8:6.9.11.60+dfsg-1.6+deb12u2

Operating system

Linux

Operating system, version and so on

Debian Stable (Bookworm)

Description

Hi,
if I load an svg file in a php script and convert it to png, the resulting image is broken, doesn't respect the original.

Steps to Reproduce

<?php

$svgFile = 'input.svg';
$outputPng = 'output.png';

try {

    $imagick = new Imagick();

    $imagick->setResolution(300, 300);

    $imagick->readImage($svgFile);

    $imagick->setImageFormat('png');

    $imagick = $imagick->flattenImages();

    $imagick->writeImage($outputPng);

    $imagick->clear();
    $imagick->destroy();

    echo "SVG converted to PNG successfully.\n";
} catch (Exception $e) {
    echo 'Error: ' . $e->getMessage() . "\n";
}
?>

Images