I have successfully built a norns shield. When connecting my Monome 40h DIY (Original Kit 40h02/070526) the device is correctly recognized. The buttons work, but the LED feedback is faulty. The correct buttons are addressed e.g. with Awake, but there is only a glitchy, random blinking of the respective buttons.
I found out that repositioning or adding grid:refresh() commands in the scripts can solve the problem. This works for some apps (e.g. Awake, Foulplay, mlr64, …); but this is not a good fix.
Do you have an idea what this could be due to? I have already tested USB Power of the Raspi (5.1V, 2.5A)