Gopigo random access issue


I already logged successfully to the gopigo using wifi and url or

The problem is each time i start a new session per day, the access is completely random. I’m able to see the SSID gopigo, connect to it, receive an ip within 10.10.10.x, i’m able to ping
But using safari/chrome/firefox sometimes it works sometimes not and i can’t understand why.
Any clue ?