Emulator

What steps will reproduce the problem?
1.Start or Load a game in New Super Mario Bros and Select 2 OR 4 players.
2.Play for about 3 minutes.

What is the expected output? What do you see instead?
The expected output would be continuing playing normally. The controls
freeze, the game doesn't freeze, if you were pressing right or left for
example, this movement will freeze and you won't be able to control anymore.

What version of the product are you using? On what operating system?
Dolphin x64 r4776 (though I tested it since 4736, when multiple emulated
wiimotes became available), Windows 7 Ultimate x64.

Please provide any additional information below.
If you choose 1 or 3 players, the controls won't freeze, so I think this
could be something about odd numbers.