2018 TOYOTA PRIUS PRIME Engine Problems

AFTER THE HYBRID BATTERY IS DISCHARGED, AND THE GAS ENGINE KICKS IN, THE VEHICLE LOSES POWER FOR APPROXIMATELY 5-10 SECONDS ON THE FREEWAY. THIS HAS HAPPENED FOUR TIMES, AT APPROXIMATELY 7 AM, ON DECEMBER 1, 10, 14 AND 15. ON ALL OCCASIONS, THE TEMPERATURE WAS BETWEEN 40-45 DEGREES FAHRENHEIT, AND AT HIGHWAY SPEEDS. THE CRUISE CONTROL WAS NOT IN USE. NO WARNING LIGHTS CAME ON. I CALLED THE TOYOTA DEALER ON DECEMBER 1 AND THE SERVICE ADVISER SAID THAT SINCE NO WARNING LIGHTS CAME ON, HE COULD NOT DETERMINE THE PROBLEM. I HAVE A PHOTO SHOWING MY CONTACTING THE TOYOTA DEALER ON DECEMBER 1ST. ON DECEMBER 10, I TOOK THE VEHICLE INTO TOYOTA IN THE AFTERNOON. THE DEALER CHECKED THE VEHICLE AND ROAD TESTED THE VEHICLE WITHOUT HAVING THE HYBRID BATTERY CHARGED, AND THE AIR TEMPERATURE WAS WARMER. I WAS CHARGED $210 FOR THE DIAGNOSTIC SERVICE, ALTHOUGH I HAVE AN...