Make sure the Basket GATE is always firmly closed. An un-locked gate will catch on the deck and may stop the BASKET completely. The basket motor will continue to turn the cable cylinder and unravel the cable.
If there is an object UNDER the BASKET which inhibits the basket from stopping at the original bottom stopping point, the motor will continue to unroll the cable from the cylinder too.
FIX: The basket safety BRAKE will engage. Tension will have to be taken off the cables so the brake will release. The cables will have to be re-wound by manually pulling back on them when the cylinder engages. The stop switches may have to be reset.