I have connected my QN90A Neo QLED to my Dell laptop via Easy Connection but it will only Duplicate the screen. Selecting Extend Display does not work. The cursor also is a bit glitchy - it disappears a bit but otherwise looks ok. I tried the other way of PC on TV connecting via Windows Connect but there was a massive lag and it was unusable. HDMI works fine but I would like to get rid of the cable running the width of my apartment. Any ideas?