position fen moves occasionally cannot be truncated from the start

[calcitem]

I/flutter ( 9579): recorder.movesCount = 50
I/flutter ( 9579): [movesSinceLastRemove] posAfterLastRemove = 49
I/flutter ( 9579): posFenStr: position fen O**O*O@*/@OOO***O/@@OO*OO@ b m s 5 0 11 0 0 1 25 moves (1,7)->(1,8)
I/flutter ( 9579): send: position fen O**O*O@*/@OOO***O/@@OO*OO@ b m s 5 0 11 0 0 1 25 moves (1,7)->(1,8)
I/flutter ( 9579): send: go
D/MillEngine( 9579): szLine = position fen O**O*O@*/@OOO***O/@@OO*OO@ b m s 5 0 11 0 0 1 25 moves (1,7)->(1,8)
D/MillEngine( 9579): szLine = go
D/MillEngine( 9579): println: bestmove (1,4)->(1,3)
I/flutter ( 9579): response: bestmove (1,4)->(1,3)
I/flutter ( 9579): Computer: (1,4)->(1,3)
I/flutter ( 9579): position: command = (1,4)->(1,3)
I/flutter ( 9579): Score: 0 : 0 : 0	total: 0
I/flutter ( 9579): 0.0% : 0.0% : 0.0%
I/flutter ( 9579): recorder.movesCount = 51
I/flutter ( 9579): [movesSinceLastRemove] posAfterLastRemove = 49
I/flutter ( 9579): posFenStr: position fen O**O*O@*/@OOO***O/@@OO*OO@ b m s 5 0 11 0 0 1 25 moves (1,7)->(1,8) (1,4)->(1,3)
I/flutter ( 9579): send: position fen O**O*O@*/@OOO***O/@@OO*OO@ b m s 5 0 11 0 0 1 25 moves (1,7)->(1,8) (1,4)->(1,3)
I/flutter ( 9579): send: go
D/MillEngine( 9579): szLine = position fen O**O*O@*/@OOO***O/@@OO*OO@ b m s 5 0 11 0 0 1 25 moves (1,7)->(1,8) (1,4)->(1,3)
D/MillEngine( 9579): szLine = go
D/MillEngine( 9579): println: bestmove -(1,8)
I/flutter ( 9579): response: bestmove -(1,8)
I/flutter ( 9579): Computer: -(1,8)
I/flutter ( 9579): position: command = -(1,8)
I/flutter ( 9579): Change sideToMove to @
I/flutter ( 9579): fen = O*O**O**/@OOO***O/@@OO*OO@ b m s 4 0 11 0 0 1 26
I/flutter ( 9579): Score: 0 : 0 : 0	total: 0
I/flutter ( 9579): 0.0% : 0.0% : 0.0%
I/flutter ( 9579): recorder.movesCount = 52
I/flutter ( 9579): [movesSinceLastRemove] posAfterLastRemove = 0
I/flutter ( 9579): posFenStr: position fen O*O**O**/@OOO***O/@@OO*OO@ b m s 4 0 11 0 0 1 26 moves (2,4) (2,8) (2,2) (2,3) (2,6) (2,5) (3,2) (1,2) (3,8) (3,4) (3,1) -(2,5) (3,6) (3,5) (1,3) (1,4) (1,5) (1,6) (3,3) -(1,4) (1,8) (1,7) (2,1) (1,1) (2,7) (3,7) (1,5)->(1,4) -(2,4) (1,6)->(1,5) (2,3)->(2,4) -(1,5) (2,2)->(2,3) (1,2)->(2,2) (3,5)->(2,5) (1,7)->(1,6) (2,7)->(1,7) (3,4)->(3,5) (1,7)->(2,7) (3,5)->(3,4) -(2,3) (2,7)->(1,7) (1,3)->(2,3) -(2,5) (1,7)->(2,7) (1,4)->(1,3) -(2,7) (1,8)->(1,7) (1,3)->(1,4) -(2,6) (1,7)->(1,8) (1,4)->(1,3) -(1,8)
I/flutter ( 9579): send: position fen O*O**O**/@OOO***O/@@OO*OO@ b m s 4 0 11 0 0 1 26 moves (2,4) (2,8) (2,2) (2,3) (2,6) (2,5) (3,2) (1,2) (3,8) (3,4) (3,1) -(2,5) (3,6) (3,5) (1,3) (1,4) (1,5) (1,6) (3,3) -(1,4) (1,8) (1,7) (2,1) (1,1) (2,7) (3,7) (1,5)->(1,4) -(2,4) (1,6)->(1,5) (2,3)->(2,4) -(1,5) (2,2)->(2,3) (1,2)->(2,2) (3,5)->(2,5) (1,7)->(1,6) (2,7)->(1,7) (3,4)->(3,5) (1,7)->(2,7) (3,5)->(3,4) -(2,3) (2,7)->(1,7) (1,3)->(2,3) -(2,5) (1,7)->(2,7) (1,4)->(1,3) -(2,7) (1,8)->(1,7) (1,3)->(1,4) -(2,6) (1,7)->(1,8) (1,4)->(1,3) -(1,8)
I/flutter ( 9579): send: go
D/MillEngine( 9579): szLine = position fen O*O**O**/@OOO***O/@@OO*OO@ b m s 4 0 11 0 0 1 26 moves (2,4) (2,8) (2,2) (2,3) (2,6) (2,5) (3,2) (1,2) (3,8) (3,4) (3,1) -(2,5) (3,6) (3,5) (1,3) (1,4) (1,5) (1,6) (3,3) -(1,4) (1,8) (1,7) (2,1) (1,1) (2,7) (3,7) (1,5)->(1,4) -(2,4) (1,6)->(1,5) (2,3)->(2,4) -(1,5) (2,2)->(2,3) (1,2)->(2,2) (3,5)->(2,5) (1,7)->(1,6) (2,7)->(1,7) (3,4)->(3,5) (1,7)->(2,7) (3,5)->(3,4) -(2,3) (2,7)->(1,7) (1,3)->(2,3) -(2,5) (1,7)->(2,7) (1,4)->(1,3) -(2,7) (1,8)->(1,7) (1,3)->(1,4) -(2,6) (1,7)->(1,8) (1,4)->(1,3) -(1,8)
D/MillEngine( 9579): szLine = go