Hi @Tony Myles
Welcome to our forum!
What is your account? Outlook.com or something else?
As i know, outlook.office.com is often used for work or school accounts. If you are using a personal outlook.com account, it is recommended that you use outlook.live.com website to see if there is any difference. More information: How to sign in to or out of Outlook.com - Microsoft Support .
If the above does not help, you may want to log in to Chrome on a different device to see if the problem persists, and if not, you may need to uninstall and reinstall Chrome to check if there is a difference.
Hope it helps!
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