IntelliJ editor text selection fix

Hi,

whenever I move my mouse in the editor, it marks the line's background (in gray)

if I press inside the editor (one click, no matter where), it starts selecting text, and it stops selecting after I press again anywhere else in the text so the highlighted text is the whole text between the two mouse clicks.

How to disable it?

All I could find is using column selection mode(Alt+Shift+Insert), but it does not really solve it

Thanks, Alex