Okay, most probably, this can be fixed without getting a new touchscreen!
Right now, the touchscreen is applied to the display using doublesided tape (so that we could replace it ourselves in case the touchscreen cracks).
This means there's a bit of air inbetween - which leads to a refraction that cause these issues.
We will now get a few samples where the touchscreen is bonded directly onto the display.
You will never be able to remove it (which you usually don't need to do anyway, as no dust can go between the touch and the LCD if it's bonded), and there's no air between so there shouldn't be any refraction.
I'll keep you updated