NHTSA Complaint #11482522 — 2021 AUDI Q7

I pulled out of the gym after using my key FOB to unlock and start vehicle. Got a warning asking if Key was in the car, it was, and warning went away. A 1/4 mile later, while the car was in drive and idle at a red light, the car completely shut/locked down and alarm started blaring saying there was no key. The key was in the car (it had just unlocked and started the car less than 4 minutes earlier). The car defaults to ON of an auto/on function (gas saving feature?), and I believe that becuase the car was waiting at the light, prompted the computer to misfire functions. I was stuck in traffic and could not get the car to start for over 3 lights length of time. I also found I had no control of the hazard lights. I was able to eventually get it to turn on, alarm persisted. I then drove it home with alarm still blaring and got my spare key, the alarm shut of briefly and then turned back on. I then drove it to Audi servicing while alarm blaring. They assessed the vehicle over the past 10 days and simply told me it was due to the key FOB battery dying. Meaning: they are telling me that this is normal and will continue to happen every time my battery dies. This is very dangerous. I don't know how/if they actually confirmed the battery was dead or simply changed it out. The key FOB battery dying should NOT cause a car, while in drive, to completely shut/lock down. This is a huge safety issue. Someone could have not seen me and rear ended me. Or if I was in traffic on the freeway and my FOB battery dies, then I would really be in trouble. I have other Audis and a FOB key dying has never caused a lock down. Once the car is in motion, the ability of the key fob to affect the ignition or engine should be zero. I believe this issue needs to be looked into and am not getting good response or action from AUDI. I do not feel safe driving a car that will lock down while in drive, and my concern extends to other people who may find themselves in this situation.