(video demo) Strange form behaviour in chrome and ff under linux

private static function extractTextToContent($rawHtml): array
{
    // First, clean up the HTML using Purify
    $html = Purify::clean($rawHtml);

    // Add the last block if there's any content left
    $blocks[] = [
        'data' => ['content' => $html, 'theming' => null],
        'type' => 'text_block',
    ];

    return $blocks;
}

private static function extractTextToContent($rawHtml): array
{
    // First, clean up the HTML using Purify
    $html = Purify::clean($rawHtml);

    // Add the last block if there's any content left
    $blocks[] = [
        'data' => ['content' => $html, 'theming' => null],
        'type' => 'text_block',
    ];

    return $blocks;
}

$set('content', []);
$blocks = $this->extractTextToContent($state);
$set('content', $blocks);

$set('content', []);
$blocks = $this->extractTextToContent($state);
$set('content', $blocks);