Do you use a view with parameters ?
Could it be the mouse or the mouse driver ?
I do not know about EDU version but I know you should update your Archicad to remove any bug or other strange or even counterproductive behavior of archicad and caused by the Windows update or by specific hardware.
Christophe - FRANCE
Archicad Designer and Teacher
Archicad 15 to 26 FRA FULL
OS 11.6 Big Sur - MacBook Pro 2015 - 16Go RAM"Quality is never an accident ; it's always the result of an intelligent effort" John Ruskin