Box around cursor finger icon

Recently I've noticed that certain cursor actions cause the finger icon to appear with a gray box around it. It appears when I hover over other icons (for example, the menu items at the top of this website; Microsoft Teams options but not MS Word, etc.). Is this new? Is there a way to get rid of the box?

Could you show a screenshot, in the case of this website ?

Which MacOS version ?

I can't do a screenshot because the condition disappears if I attempt to do that. I've created a facsimile of it here. I'm running Tahoe 26.3

Just occurred to me to take a photo of it...

Box around cursor finger icon
 
 
Q