Disconnection & multiply

When ever i join a lobby and hit the ready button or when a duel start's and I select a card I disconnect from nexus. another thing that has happened is i get disconnected and reconnect and i start to multiply in the same lobby. the dueling bot also seems to have trouble as when i try to set up a bot game the bot will not join the lobby and after a while i disconnect again.

thank you for listening to my problem.