when I had problems it would usually be around step 14 – if I selected the next pattern just ever so slightly before or on step 14, it would induce the skip error. I could not always replicate it because the change was always selected based on my own personal “feel” of when to do it. this was on 16 and 64 step programs even. the update seems to have squashed that bug, but I have not tried in patterns set to other LEN values.