I created a design with 20 ws2813 LEDs , and while programming the board, with minimal interaction of the board, i already had 3 LEDs fail, in different ways.
on one just one color failed, on the other the brightness regulation failed, one has completely disabled. I just followed the schematic on the datasheet.
Don't see anything obvious i could mess up. at first all LEDs worked correctly, all colors, all brightness settings. The started to fail after more then 24 hours of the assembly.
The leds are supposedly genuine worldsemi products, ordered from LCSC. They where properly packed in anti static bags.
Just as i was writing this, the board running in demo mode, i observed another LED to fail, so it makes 4 so far, and that's 2 LEDs in a row, so most of the leads don't work anymore.