Hi guys recently got a mark1 fabia vrs and its a great wee car, just last night i noticed that when i use the remote key to open the doors , that all the doors will unlock expect for the front passenger door, when u get into the car and try to open the door it still will not open with the handle or the switch on the drivers side, the metal push down locking system does sit up when you pull the handle but goes back down into the locked position, once you start the car and use the switch to open the doors on the drivers side the door will then open, ive tried to research this problem but cannot find a solution,  im here to ask if this is common in the fabia and do i replace the door lock?

Yes and yes, unfortunately you need to get the door open to replace it, which is tricky.