It just happened to me again tonight. Hmph. (I understand it's hard to replicate -- also, Internet presumably just works in India, unlike the United States where we pay first-world prices for third-world quality internet service...) Independently of reproducing the bug, my suggestion was, if someone has time and energy to do this, see if there's a way to await an effective confirmation from the backend before considering that the solve has been successfully recorded and taking the user to the score page. Anyway I understand this is not super urgent.