Windows all open when locked

When the car is parked and locked after indeterminate periods the windows all fully open. This usually happens when raining or in damp conditions and the car gets flooded. The mirrors stay in the folded condition and the doors seem to remain locked. This has happened intermittently since the car was brand new. Ford have been unable fix the problem despite numerous attempts and obviously don't really know what the problem is. They usually "reload the software" and claim it will "now be okay". The problem is never fixed and just occurs again a few weeks/months later.