VMW100 NeoPixel libary issue

The latest (v1.3.5) version of the Adafruit NeoPixel library does not seem to work with the VMW100 board, leds turn on as white (I think at full brightness) and the 3.3V regulator gets very hot.

However, using the FastLED (v3.3.3) works fine.

I suspect a slight timing issue, most likely from running the 32U4 at 8MHz instead of 16MHz, but that’s only a guess.

Any advice or ideas on how to get the NeoPixel library to work?