Can anyone tell me why I have this header artefact and how to remove it?

edited 07/11/23 in Smartsheet Basics

Hi all,

I recently started using our company logo on our smartsheet account.

All has been well until a few moments ago when I got this showing up on all of my Smartsheet screens...

Can anyone explain how I remove this unwanted text please?

I have tried restarting my browser but to no avail. I will try a restart of my conmputer and see if that helps.