I received a call from a client complaining about no longer being able to switch between their gmail accounts (which you normally do by clicking on your avatar

I received a call from a client complaining about no longer being able to switch between their gmail accounts (which you normally do by clicking on your avatar in the top right corner of the gmail app on desktop). After a bit of back and forth, I asked for a screenshot. They sent me a photo of the screen and it became apparent that they were clicking on this new avatar embedded in the browser chrome rather than the gmail app avatar below it.