What is this white/grey transparent circle/box in the top left corner of my windows 11 desktop background?

[Aries419]

Hello there, I have noticed that there is this odd transparent box in the corner of my desktop.It seems to sit on the desktop background layer, and the cursor can go over the circle/box, and sometimes, when I click it, it turns red.However, I can't seem to click it more than once in a row to turn it red. I have to let it sit there, go to a different window (other than my desktop), and then come back to do it again.I have tried going to "Settings>accessibility>mouse pointer and touch" and disabling touch indicator (because I don't have a touch screen anyway, and it was on for some reason)

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