Large lump/lumps on the lower left / bottom portion of the driver’s seat, protruding from the seat bottom closest to the lower bolster. As a direct result my left leg loses its circulation, it causes numbness and muscle pain in thigh and groin due to this. Regardless of seat adjustment the lump / imperfection in the seat cushion is present. This can become dangerous during longer drives and trips. According to the Lexus forums this is a known issue in the 2018-2024 LS500 that Lexus is apparently aware of but has not resolved or seriously looked into. My Lexus service advisor admitted that she has heard of this problem from other LS500 owners and said that the issue has been reported to Lexus. Despite this known issue, no technical service bulletin has been issued by Lexus and no corrective action has taken place. The imperfection in the seat can create a safety issue during trips due to it causing numbness, pain and discomfort in the leg. This is not an issue one would expect in owning a $100K plus vehicle.