Many issues that happen within Web Browsers are based on old data that is being stored. This is called "Cache". Try Clearing/Resetting this, and see if this solves your issues(s). How to refresh your Cache?

For Chrome

https://support.google.com/chromebook/answer/183083?hl=en

For Firefox

https://support.mozilla.org/en-US/kb/how-clear-firefox-cache

For Internet Explorer

https://support.microsoft.com/en-us/windows/view-and-delete-your-browsing-history-in-internet-explorer-098ffe52-5ac9-a449-c296-c735c32c8678

For Safari

https://guides.instructure.com/m/4214/l/60429-how-do-i-clear-my-safari-browser-cache