The car has normally charged fine on the 3pin plug using the off peak schedule in the car.  Just plug it in and it charges.

 

recently, it’s been plugged in and the timer light has lit up, but then an hour later the thing starts charging for unknown reasons!  It’s don’t it 3x this week.  I’ve checked all the settings like off peak and the schedule etc, but it’s all ok.

 

anyone else sometimes have this issue?  If I notice it happen and press stop charging on the app then it does stop and then waits until the schedule to trigger it to charge

Do you have a minimum charge level set. On the Passat this brings the charge level up to that set amount as soon as it's plugged in. Maybe a recent service or update has triggered it into life.