Comment by arctics

Throttle control module (TCM) was replaced twice in the past 2019 and 2023 which is not very usual.

Now pure speculation, both pilots have long record of flying, you have to literally pull up and move each fuel control switches to cut off. Either one of the pilots did this intentionally or control unit was faulty. Considering past history and pilot experience, my bet is on faulty controls but we will never know.