Clicking down arrow opening help menu at top
When I click the down arrow on my Mac, say for example in the mail app just so I can tap through the emails easily without needing to move, it just opens up the help menu in the bar at the top. Happens in safari too when searching something and pressing down to choose one of the autofill options.
I'm fully updated to Monterey 12.4, but this has been happening for months across all the updates anyway.
Any help would be appreciated to sort this.
MacBook Air 13″, macOS 12.4