Ok I managed to get logs of this happening. But I'm not sure how to read them.
I have uploaded it here:
https://www.dropbox.com/s/ldqz2ibmkl...ogcat.log?dl=0
I am reading normally up until 21:33:40-50ish, when the forward page key stops working. I believe the timestamp 21:33:58.613 is when I finally give up trying to press page forward and press page back (which goes back 2 pages instead of one, one of them being a pan up). After this I am able to use page forward as normal.
Maybe someone more knowledgeable can get some insight from this.