Default Samsung Multimedia Dock and 4.3 update

I have the Samsung Multimedia Dock (the one with 3 usb port and HDMI), buyed 1 yar ago.
With the 4.3 update I have some problems
with 4.1.2 when i put the note into the dock the screen of the note become mirrored to the tv, with 4.3 update the image disappear on the note and appear only on the tv, but the touchscreen stay active. If i try to watch a video the video is showed on the tv, but control remains on the note (with the screen black) If i disconnect and reconnect sometimes i see images on both screen.

I don't think it's a problem of the dock or an hardware problem of the note, because with an other note2 it works correctly.