On a couple of Android mobiles I have found the official Twitter app frustratingly jumps to the top of the timeline; skipping unread messages and leading to frequent manual scrolling to locate the previous reading position.
The trigger seems to be the accelerometer which, picking-up on a rotation, jumps to the top of the timeline in addition to the providing the expected screen rotation.
My temporary remedy is to disable 'Auto-Rotate screen" (settings | device | display)
It's a pain because if you have a lot of messages to catch-up on you've got to ensure the mobile stays vertical.
Edited by PeterPandroid, 07 October 2013 - 09:48 AM.