Many times when something on a website changes that change is not visible to the public immediately. This is most likely caused by the visitor's browser caching a previous version of the website. The easiest way to clear cached data for the current page a user is visiting is for them to do a hard refresh. A hard refresh reloads and clears cached data for the page a user is on.
How to do a hard refresh?
Windows: ctrl + F5
Mac/Apple: Apple + R or command + R