Yes, this is indeed an artifact of eInk technology which was originally conceived for the static display of text & images only (with a refresh inbetween each page) There may be new tricks & faster controllers, but it will probably never completely go away due to the physical nature of eInk (moving black particles from/to the surface of the display)
While the current solution on the DR1000 might seem a bit clunky (having to refresh the screen from time to time) it beats not seeing anything you write (as is the case with the experimental port of Xournal which does not use this "Screenmode")
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