16.04 Mouse icon is not displayed after return of screensave mode

Hi, I've just let the Ubuntu to auto upgrade to 16.04

After the upgrade, I noticed that if I let the computer to enter in screensave mode and the switch back to desktop, the mouse is not shown on the screen anymore. It is working but I caot see where it is. When I click somewhere on desktop it activates the menu, if I move the mouse and right click again the mouse button the menu opens in a new position. So the mouse is working but the mouse cursor(icon) is not displayed.