That happened to me last week. App says status was updating, but it wasn't. None of the functions worked either, like precool. That has happened periodically, but it has been a Porsche server problem and gets corrected overnight. This didn't, so I called Porsche Connect.
Symptoms they looked...
Same thing happened to me, from one charge to the next, 85% was 250+, now about 190 with outside Temps maybe only 10 degrees colder. Happened just about 3 weeks after 2023 dealer Software update. Hmmmm
12v battery disconnect/reconnect worked for me. I would have tried the fuse, but couldn't figure out how to access it on the passenger side. If anyone has a video on that, much appreciated.