Graphics problems in score editor

Hi my friends, sorry for my English, I’m Italian.

I just installed cubase 9.5 with last update. When I open the score editor, I notice that the position cursor disappairs when I use the arrows Keys to move it. And When I click on the button that shows the bar handles they don’t appair. It seem to be a grapich GPU problem but I’m wondering if any of you have the same problem.

Thank You in advance, Luciano.