Brakes from high speed

Hey guys, I drive a daily highway and often over 200. Now it is often the case that there are specialists (mostly in the Golf Plus ;-)) who follow a truck with 90, and just then drive out when you come from behind to overtake the truck with 105 KM/H. At such moments I would often have to brake heavily and have often had the feeling that the vehicle becomes unstable when braking at high speeds and swings slightly, or slings something. is a normal D3 Bj 2017 with standard chassis and 205/55R16 Michelin summer tires. Has anyone ever observed that? Chassis and tires seem okay. Car has about 7000 KM. Best Greetings Max