I don't have a dedicated car charger port at home ( the demand for these things is crazy right now and I can't get an install booked ), so I'm trying to charge at home from a standard 3 point socket in my garage. Being the UK, my garage is cramped and getting around the car when it's parked inside is tight going. At the moment to get the car off the charger I have to get all the way around into the driver seat, click the unlock on the dash then go all the way back around and unplug the cable. I assumed the external cable release didn't release when the charge was in progress. Although in which case I can't fathom when you'd ever use it. At fast chargers in the wild getting around the car isn't a drama (but why are tethered charge cables so short? and why did Volvo stick the charge port on the rear side of the car? ). I tend to end the charging session from the charger, or from the mobile app and at that point it seems to unlock the cable. So I guess I'd always assumed the unlock button was a feature useful in limited circumstances. That was my best attempt to pretend it wasn't just another broken thing.