In the past few days, I've occasionally noticed that when I open my smart cover (while it's on the IPP) and then unfold it to use the keyboard, the keyboard is not responsive. That is, none of the keys work at all. I tried disconnecting and reconnecting the keyboard, but it didn't fix the issue. In fact, the only way I could get the keyboard to work was to hard reset the IPP (hold down power and home buttons until Apple logo show up on screen. Has anyone else had this issue? More importantly, does anyone know why this is happening and if it's something of concern?