I've had a few issues with the keyboard including having the cursor stuck between letters and not being able to move it to the end with keypad or arrow keys.
Also had the backspace freeze up and the cursor jumping to the address bar or beginning of the text. I've spent the last few weeks trying to decide if it's me or the TP and am pretty sure now it's not just bad typing or accidentally hitting the keypad (which I turned off and still experienced the problems). It's a shame as physically the keyboard feels great to type on and sometimes it works fine so hopefully they're glitches that will be fixed or I'll figure out what I'm doing wrong.
Sorry I can't help with a solution but the one thing I didn't think to try was using the function key to go to end?