Oh, pitfalls, both technically and socially on multiple levels:

• As I could (and still can) reproduce this "shifted screen"-issue on two different devices (by hardware and installed SFOS version), I assumed it to be present for many. But as nobody has chimed in to the Github issue or here at TMO, now I believe that it is just me being affected.
• Sorry for cross-posting this issue yesterday. The intention was to make others aware of this (as most people seem to prefer a forum over a proper issue tracker), not to get on your (@MartinK) nerves (as you likely received a notification from Github, already).
• Lets continue debugging and discussing the technical aspects of this issue at modRana's issue tracker at Github, e.g. that this issue "funnily" evades debugging.