There are several reasons why a candle wick may bend while burning. One common cause is improper placement of the wick during manufacturing or pouring of the candle. If the wick was not centered properly when the hot wax was poured into its container, it can tilt and bend as it solidifies in an off-center position. Another reason for a bent wick could be excessive drafts or air currents around the burning candle. Strong gusts of wind or nearby fans can disrupt the flame's stability and cause the wick to lean or bend due to uneven heat distribution. Additionally, if there is excessive moisture in the surrounding environment or within the wax itself, this can lead to uneven burning and potentially cause a bent wick.