Luckily never been bitten by component orientation issues. But every time I get a PCB assembled at JLCPCB with WS2812b or WS2816b LEDS they always email me to confirm LED orientation. I'm assuming customers have messed this up frequently enough to require a customer ACK.

They will send this email for all LEDs and generally all polarized components (capacitors, diodes, etc.)

JLC is also extremely unique because they offer the component orientation configuration GUI. This GUI's output is likely used for PNP tape orientation configuration as well.

ws2812 family is a mess. The pin 1 is not the pin which has the corner mark and pinout varies between specific packages and variations.