I have been having the same problem off and on since getting my car in August. But it is getting worse. Now it is happening during daytime also. I have rebooted the software, turned sentry totally off and tried changing a setting in my Iphone( as someone suggested on YouTube.) Please is there anything else to try. Have Tesla service coming, but not for a week. Meanwhile it is disturbing my neighbors with the constant honking.This has been happening to me as well since updating to 2021.36.5.5, and now 2021.36.8. Every minute the lights flash. The car is parked in my garage and there is definitely nothing moving around the car.