Application displaying issue from the taskbar

Hi everyone

There is trouble with the windows taskbar that I am facing. If I place the cursor on any icon of the taskbar it displays a small window over the taskbar and then if I place the cursor on the small window icon it displays the large window on the desktop.

As you can see below I put my cursor on the calculator app in the taskbar and move cursor to the small screen which shows the actual calculator app.

but in another pc, if I place a cursor on it than it doesn’t display the large window. (note: this is an example image, at present, I cannot produce the image from the affected PC)

I think it’s the problem if settings. I tried to solve it but no luck.

Thus anyone here to help me