Below is a list of things you may want to consider if you are experiencing slow internet only on one website:

1. Perform a speed test. Make sure your internet connection is running at optimal speeds.
2. Check the packets. Make sure data packets are being sent successfully from your router to the website.
3. Check your signal strength. Make sure there is a strong signal between your router and the device that is having issues.
4. Check for proxy settings. Make sure your device is not using an outdated, incorrect proxy setting.
5. Look for malware. Make sure you do not have any malicious software running in the background.
6. Clear your cache. Clear the cache of the browser you’re using to access the website.
7. Check for update the website. The website might be undergoing an update that is slowing down the page load.
8. Contact customer support. If the issue persists, contact the website’s customer support for additional assistance.