moves to defend

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Otter3562
i have encountered a few positions where it has not let me defend a piece which has cost me a few games. even in simple as moving the b pawn to b3 instead of b4 to defend a rook protecting my king from a mate is the most recent. is there anywhere to turn this off or get it fixed?
corum

You need to post a game so that we can see. What you are saying sounds implausible.