2020 Porsche Cayenne POWER TRAIN,VEHICLE SPEED CONTROL,SERVICE BRAKES

MY PORSCHE 2020 S HAS BREAKING ISSUES WHEN IN SPORT MODE. WHEN THE CAR DOWNSHIFTS FROM 3RD TO 2ND GEAR, AND 2ND TO 1ST GEAR, THIS IS A SUDDEN JOLT FORWARD OR "LURGING" THAT OCCURS EVERY TIME. THIS IS A SAFETY RISK IN BUMPER TO BUMPER TRAFFIC AS THE CAR CAN SUDDENLY JUMP FORWARD A FEW FEET MORE THAN INTENDED BY NORMAL BREAKING. EVEN WHEN DRIVING AND BREAKING EXPLICITLY TO COMPENSATE FOR THIS TRANSMISSION / BREAKING DEFECT, THE LURGING ISSUE CANNOT BE AVOIDED. THE ONLY WAY TO AVOID THIS ISSUE IS TO (A) BREAK HARD FROM 3RD TO 1ST GEAR (SO FROM A FAIRLY HIGH SPEED DOWN TO 0, WHICH LENDS ADDITIONAL BREAKING SAFETY RISKS IN NON-IDEAL WEATHER CONDITIONS SUCH AS BREAKING DOWNHILL OR ON WET / ICY ROADS), OR (B) TO NOT DRIVE THE CAR IN ONE OF THE TWO DRIVING MODES OFFERED. THE MANUFACTURER'S SERVICE DEPARTMENT CLAIMS THERE IS NO ISSUE, BUT SOME QUICK GOOGLE SEARCHES SHOW THIS ISSUE IS EXPERIENCED WIDELY AND WELL DOCUMENTED, AND A SOFTWARE FIX HAS BEEN ROLLED OUT OVERSEAS THAT ISN'T AVAILABLE IN NORTH AMERICA