自分で試してないのでなんとも言えませんが、サモンの長押し設定を無効にしてますか?
Summon with Key Fob (2019.7.11)
You can move your Model 3 in and out of a parking space from outside the car using a paired key fob. To initiate Summon, stand within 10 feet (3 meters) of the parked car and press and hod the top center button on the key fob until the hazard lights blink continuously. Press the front or rear trunk button on the key fob to move the car forward and reverse respectively.
Note: To operate Summon with key fob, ‘Require Continous Press’ must be set to NO under Controls > Autopilot > Customize Summon.