May be unrelated but I think after I've set the car to sport individual mode by default (only have the engine in sport, the rest normal) I rarely had the issue.
Also, I simply changed the way I back out of the garage on that slope, avoiding one wheel getting air at all. Never had an issue when...
Today I had a very embarrassing moment that may be related to the same issue. I was backing out from the garage on cold start (revs went down already) down a little slope in R gear but without pressing the gas pedal. The car threw me a "prevent rolling" alert and became completely unresponsive...
In the same timeframe, there were about 35M passenger cars sold in the US and about 16.5k are Supras. This means there is one Supra for every 2121 cars in the US. Or a 0.047% chance that a car in the US is a new Supra.
I was thinking this is related to the 3-wheel situation too at first. But then it did this at a traffic light... it was a minute after it almost stalled at the driveway. Wondering if it can be related.
I've used bimmercode to set the default mode to sport individual and I think everything was ok so far. My sport individual only has Engine set to "Sport", the rest is all Normal.