Yes, I agree, that appears to happen with me too. A recharge does appear to fix it, even a 5min charge will allow it to work again, though you need to be "plugged in" to continue
It's funny, because the battery lasts so long, you tend to forget it needs charging, I leave mine for a couple of weeks at a time on occasions and usually there is plenty charge left, but occasionally I then get the 3 dots to nowhere page and have to action as above.