Dumbfounding (electrical?) Issue with Yaris door locks

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Something very strange happened today that is puzzling me. 2008 Yaris liftback 3 door. Whatever version unlocks the doors automatically when they’re opened and key is in the ignition - I have that one (power package?). My doors have ALWAYS unlocked automatically when the key is in the ignition, obviously so that a driver doesn’t lock themself out.

Today I parked my car with it still running to drop something off. I came back to my car and the car was running with all 3 doors locked. Absolutely impossible! I ended up having to wait almost 3 hrs for my car insurance to provide a lock out service. I just don’t understand how the car can possibly end up like that. All doors were fully closed and confirmed locked by looking inside the windows.

I should note I also noticed over the past few days there is a slight rattle at 3k RPM for a split second coming from under the driver side dash. I wrote it off as the cold as temps are dropping where I live. Could this be some electrical anomaly, or bad alternator? Anyone have a clue? Thanks.