Welcome!
For me, there was a lot to get used to when I first drove a Tesla. I don't remember my foot slipping off the brake pedal but I did make other silly mistakes. I haven't seen other people reporting this problem so I would chalk it up to getting used to the car.
Do what works for you. I suggest spending time to learn how to get the most out of the car. It's great fun but it's different enough from other cars I've driven that it took me a while, especially learning how to best use autopilot. Here are a few tips:
- One detent up on the right stalk disengages autopilot, but 2 up puts it in reverse
- Press the button on the right stalk for several seconds to engage the parking brake
- Press the current speed or posted speed on the touchscreen to set the max speed when AP is engaged
- The blinkers are weird. I disabled Auto Cancel turn signals because they do not work well where I live,
- In which case, one detent up or down on the left stalk disables the blinkers
- If turning left and then right, (or vice versa) it's tricky to disable the left blinker then enable the right
- You can't disable auto-brights or auto-wipers when AP is engaged
- With AP enabled I often use the right scroll wheel a lot to set the speed
- You can also use the accelerator to go at a speed higher than the AP max speed
- The car is cautious about vehicles crossing or slowing to turn up ahead. I'm ready to use the accelerator when I see this
- IMO the max follow distance is too short so I change speed or pass to avoid following a car too closely
- I treat AP as driver assistance, not driver replacement. I love it and use it for about 80% of my driving
- If the auto-wipers turn on when there is no rain then it's time to clean my windshield