Passenger doors won't unlock with key fob button or inside unlock button

I have a 2005 Mazda 3, and about 4 or so days ago, the passenger doors (all 3) won't unlock with either the key fob after being pushed twice, or with the button on the inside of the vehicle that is supposed to unlock them. On the outside or even once on the inside, and all doors are locked, I push either button, and the driver door unlocks with a heavy click. Once I push it again, it makes a soft, weaker clicking noise (which is what has changed as it used to make the same heavier unlock click) but does not unlock the other doors.

If I manually unlock them, the lock portion still works on all doors.

However, as I was driving on the highway, I happened to try it again just to test it again, and it unlocked the doors, however when I tried it again once parked, it didn't.

Any help would be great.