iPad behaving erratically: "ghost touching"

I have the same problem, and I found out what's wrong, it's not the software - restart, restore and FW upgrade will not help, if's defiantly hardware.
The best option is to replace your iPad assuming you have an apple store nearby… which I don't 😟 however I found what's causing it and how to bypass the issue almost completely 🙂
It's caused by the case pressing on the borders of the iPad, if you plan to continue using your case make sure it applies no pressure on the iPad - stretch it a little.
Then, take your iPad out of the case (the random / ghost typing will continue..) hold it on both sides, and press hard like your trying to "fold" it towards the apple logo on the back, once you do that you'll that the iPad works normally, and will keep working ok for a long time, if the random typing returns, just do the "folding" action again.
When pressing, apply strength but don't overdo it, you don't really want to fold your iPad (or break it), hope this helps…