Duel state not updated after played

In some cases, after a player played a duel round, the duel state is not updated. This includes that

• the user_next field is not updated,
• the duel is not set to closed, when it's the last round.
• When user_next is updated manually after p1 played round 2/2, the user_next is reverted back to p1 after p2 played the round, not closing the duel.