Sorry for bumping this old conversation, but I have the same problem as in the top post.
All examples runs without errors nor exceptions, with expected log outputs etc. I’ve enabled all interfaces, and installed the latest version of the library without any trouble. The display is simply stuck on the original image, no matter what.
I’m running with RPI zero w, I’ve tested it with another RPI zero w with the same (non-existant) result. I’ve also tested with different GIPO pins etc but no cigar.
(I have not soldered my InkyPhat onto the rpi 0, since I’m not good at it. If it was neccessary I did not want to solder anything before checking the inky anyway.)