I figured I would reply to this discussion since I saw that Benster also reported it as well. This is still an issue for me and others. This happens here at UNA and of course my site as well when posting a timeline post, or commenting anywhere (including forums). Seems to be specific to Android devices with Chrome browser and Samsung's default browser. FireFox is not affected.

The best way to that I can explain for those who want to try and reproduce is to do the following:

Using Android and Chrome, type a word in the comments here - hit the space button about 3 times - then hit the delete/backspace button 1 time. That should jump you to the top of the page.