It's getting colder in Poland, isn't it? That's why the range is now dropping. Same here in Finland, 100 SOC range down from 520km in the summer to 450km as the temperature has dropped by around 20C.
Try deleting the existing timers in the car (swipe left). The max amount of timers is five, and the app sometimes stops working until the old times are deleted.
Nite, this must be done in the car.