It's not universal among e-ink devices with Wacom. On my eDGe I only get weirdness when the stylus gets within about half a centimetre from the left edge of the screen. The rest of the screen is trouble-free, though accuracy is still difficult with the finest brush size. (The eDGe refreshes the e-ink for drawing quite a bit faster than the DR800, which does help a lot.)
I wonder if the accuracy issue has to do with the Wacom layer being further from the contact point of the stylus than with other devices. It's behind the glass and the e-ink screen. Is that thickness significantly more than with laptops?