When I try to unlock my car with the key, the front doors and rearview mirrors do not open. They unlock when I press the unlock button on the key again. This happens if I want to unlock the car again after a while after locking it. What is the reason?

Does the drivers door open on the first press of the button on the key?

No.In second press it will be open.

This happens to me too but not always. Sometimes the front doors unlock on the first click and sometimes on the second. I haven't figured out why this happens.