The wire itself is fine but the 3 wires are twisted together inside the outer insulation damaging the green signal wire from the field created by the red and black wires flowing current is generated. For Neopixel address strips (WS2811/WS2812/WS2813), the green signal wire must be separated from the others, or the 3 wires must be parallel and flat to minimize data line signal distortion.
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