Datepicker has transparent background on 4.0

**Describe the bug** When I upgrade to 4.0 my datepicker has a transparent background (which then shows the page behind it). Happens in light and dark mode. This works fine in 3.1.2. Is this a known change of behavior and something I have to confiure to work around? **To Reproduce** This is the html that is reproducing it on my side, though I have other styles on the page: ``` <div class="relative max-w-sm"> <div class="absolute inset-y-0 start-0 flex items-center ps-3.5 pointer-events-none"> <svg class="w-4 h-4 text-gray-500 dark:text-gray-400" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" fill="currentColor" viewBox="0 0 20 20"> <path d="M20 4a2 2 0 0 0-2-2h-2V1a1 1 0 0 0-2 0v1h-3V1a1 1 0 0 0-2 0v1H6V1a1 1 0 0 0-2 0v1H2a2 2 0 0 0-2 2v2h20V4ZM0 18a2 2 0 0 0 2 2h16a2 2 0 0 0 2-2V8H0v10Zm5-8h10a1 1 0 0 1 0 2H5a1 1 0 0 1 0-2Z"/> </svg> </div> <input datepicker id="default-datepicker" type="text" class="bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full ps-10 p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500" placeholder="Select date"> </div> ``` **Expected behavior** A clear and concise description of what you expected to happen. **Screenshots** If applicable, add screenshots to help explain your problem. <img width="372" height="507" alt="Image" src="https://github.com/user-attachments/assets/0aefdd6a-37f3-47c9-9373-32035ac37d7c" /> **Desktop (please complete the following information):** - OS: Ubuntu - Browser Chrome **Additional context** I'm not sure if there are any other styles on my page that might be interfering with this... If it isn't readily reproducible in a standard project I can try to dig deeper.