Why can't the new Sylphy be locked after starting the engine and getting out of the car?

[SanSimon]

Because the vehicle cannot be locked with the remote key when the engine is running, this is how it was designed when the vehicle left the factory, and all models are like this. The reason why the car cannot be locked without turning off the engine: This is for safety considerations. After parking, the vehicle remains in one position for a long time, and as exhaust emissions accumulate, they are highly likely to enter the car through the air intake (since the vehicle is not completely sealed, even with the internal circulation on, it is unavoidable). If someone is locked inside the car, the consequences could be unimaginable. Preventing forgetting to turn off the engine: