Strange behavior with SK6812 (RGBW) LED strip

[pixorama]

Thanks for sharing a great project! Everything works fine, but there is one problem that I cannot fix. I am using 14 channels of 512 pixels each. Approximately every 5-10 seconds, one random pixel flashes on each channel. This happens with both the multidemo and the led-udp.

Here is a video of this problem https://youtu.be/17IZaLhJxy8

My setup: 5 x Beaglebone Black (rev C) Debian GNU / Linux 10 (buster) Led strip SK6812 (RGBW)

Help me, Obi-Wan Kenobi. You're my only hope