Originally Posted by corpcd
The problem is that there is no reflesh between both errors, so both screens are shown at the same time in the display, so recording a video does not solve the problem.
If the screen changes too quickly, the eink drivers may not finish updating all the pixels. Seeing a combination of two messages could be an eink artifact (the first screen was not displayed long enough to finish drawing all the pixels).
Single-stepping the video playback would not help in that case.