Brake Light problems of the 2018 Toyota RAV4

My 2018 Rav4 is equipped with dynamic radar cruise control, a feature which I like very much like when traveling on interstate highways. This feature automatically decelerates my vehicle to match the speed of the vehicle ahead and keeps you following at a safe distance. However, the safety issue I have discovered is that when the vehicle automatically decelerates, it apparently does not activate the brake lights and the vehicle behind you is not warned that you are slowing down. Twice in the first couple months of owning this vehicle, while traveling on relatively straight, flat, interstate highways, I had the dynamic radar cruise control engaged and the vehicle in front of me reduced speed fairly quickly (from approximately 65 to 45mph) due to road construction. My vehicle automatically slowed accordingly, but the vehicle behind me did not realize I was slowing down because my brake lights did not activate and I was very nearly rear ended. Fortunately, serious accidents were narrowly avoided in both these incidents. I believe the dynamic radar cruise control feature is very good, very useful feature; however, the system must be modified to activate the brake lights when the vehicle automatically decelerates. One of the incidents occurred in July, 2018, and the other in August, 2018. I have discussed the issue with our local Toyota dealer and also with the Toyota customer experience center (800 331-4331). The latter established a case number (1809280901). I wish to ensure appropriate follow-up occurs to correct this safety issue.