IDE 1.8.5 display problem under win10

Hi.

I got some bug with arduino IDE. The board update window never close, even if there's is no update available.

And in the main widows, when I clic on the sketch window, the cursor doesn't make focus or if I does, it lose it after few second...

If I move the main with, it leave a trail on cascade window the disappear after some time...

Thank.

Is this issue limited to Arduino IDE 1.8.5?

It came from that update.. I should try older version to confirm...

look like to be ok with 1.8.3.

I will keep this one until the next version.