I have odd behaviour from my BT TV Box Pro and my TV. The Pro is in aerial mode, connection to TV is via HDMI. The fault is intermittent. Sometimes when I have been using the Pro Box and switch it off, my TV reverts from YouView channel to TV channel but the TV has sound and picture missing. If I then switch the Pro back on and switch it off again, reverting from Pro to TV channel again, the TV works fine, with both picture and sound. Does anyone else get this odd fault?