@Makuna That's good! Stable, animation don't stops, and now correct number of pixels are working. I changed pixelcount to 10 and then to 50 to test in your examples - funloop, cylon and animation. Seems to be working fine!
I see thats arduino want update lib from 2.0.4 to 2.0.5. I tested on 2.0.4. Is it need to update?