Hi, I've read about problems with expand stroke before, but this is the first time I've actually encountered one myself. Super simple repro - create a circle with a thick stroke that has a linear 0-100% pressure curve applied. The expanded stroke is all wobbly. I also found that you start to get some bizarre buzzsaw strokes as the circle gets smaller, I assume due to losing precision. Expanding that stroke that makes a big mess too. Screenshots with settings attached. This is in Designer 1.8.5.703.
Thanks!