I have a strange problem where after the HyperBian boot sequence of lights or after "Power Off" action is chosen from Hyperion app on Android, not all of the LEDs go out, it is different LEDs each time (see pics).
The LEDs all behave correctly for any chosen colour or effect.
If I create an "effect" where all LEDs are set to rgb(0,0,0), they all go out, so I know they are controlling "off" correctly.
However once the effect timeout is reached random LEDs come back on again.
(Latest HyperBian, Pi Zero WH, 34 x WS2801 LEDs, 5A PSU)