3 ft cable doesn't work after 2 months

I have had these cords for about 2 months and for some reason the 6 ft and 10 ft cords work great, but the 3 ft cable will no longer charge my device. When I plug it in, it usually says "This accessory may not be supported" and the charging symbol does not appear by the battery indicator. Even when I do plug it in and I do not get the error message, it seems to drain battery life out of my device rather than charge it. This occurs when I attempted to plug it into the Apple charging block in the wall, in the car, and using my mophie portable charger.

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