Repeat move always hangs UNDO

[Terkwood]

Different from #500 - - this bug should be easily reproducible and hopefully there is a more straight forward fix

[Terkwood]

In gateway...

 ♟  ..SNIP..MAKEMOVE BLACK { 4 , 6  } ..SNIP..
 ..SNIP..
 🆗 ..SNIP..MOVEMADE W Some(Coord { x: 4, y: 3 })
..SNIP..
 🔙 ..SNIP..UNDOMOVE
 Send command: UndoMove(UndoMove { game_id: GameId(SNIP), player: BLACK })

 📥 Stream: MoveUndone(MoveUndone { game_id: GameId(SNIP), pl
ayer: BLACK, game_state: GameState { board: Board { pieces: {}, size: 9 }, captures: Captures { black: 0, white: 0 }, turn: 1, player_up: BLACK, mo
ves: [], game_id: GameId(SNIP) } })

 🏞 OK MoveUndone(MoveUndone { game_id: GameId(SNIP), player:
BLACK, game_state: GameState { board: Board { pieces: {}, size: 9 }, captures: Captures { black: 0, white: 0 }, turn: 1, player_up: BLACK, moves: [
], game_id: GameId(SNIP) } })

There should have been a MakeMove logged at the end of this sequence.