LOL… When I lived with my parents, we lived on a pretty steep hill, and my car was a touch unreliable, well I became a master at the rolling start… I had to … you only got one shot… then you where at the bottom of the hill
I had a similar experience one morning where the engine management computer randomly decided to remove my key ID from its database and so wouldn’t disable the immobiliser. I called the AA (the Automobile Association in the UK, not the other AA ) and the mechanic who came just disconnected both terminals of the battery and connected them together for a few seconds to fully discharge everything and force a hard reset. When he reconnected them again, problem solved. Job done in less than 5 minutes.
I’m not recommending you try this, but it did serve as a good reminder that all computers sometimes need the big boot to clear out the fluff.