In the last weeks I experienced the same bug on multiple days. During the duel the next round timer counts down but nothing happens at zero. Because the next round isnt starting I needed to refresh the site in order to continue playing. Sometimes I am able rejoin in time, but sometimes the duel page is loading very slow as well. Im playing in the Arc browser (based on chromium) but havent tested it in other browsers. Here is a replay from a ranked duel where the first round was interrupted: https://www.geoguessr.com/duels/6952c579e3160900cd59f78c/replay?player=65f35a55fa03b84166fe1dd6&round=1&step=1