If visitors have recently been to the page, depending on your web host settings for browser caching, they will need to refresh the page to instruct their browser to download a fresh copy of the page. This is usually set in a .htaccess file saved in the public_html or www folder on your host. You may also want to contact your host to see if they use any server-side caching. Finally if you use a CDN like CloudFlare, you may need to flush the cache after a change.
Cloudflare or .htaccess will allow creating a exception for that one page.