Welcome to the forum. Some of the reasons that encourage members to fill out their personal profile is so that we have a name or nickname to call you instead of N/A and so that we know if you will understand the advice given. John is correct, you are probably going against the grain, but maybe only over a short section. Some maples and also white birch are very prone to chip out. Grain tends to swirl around knots for example and even though there may not be a knot in the board you can get the grain changing directions at the area on the board that was close to one. If that is the case you may have to try climb cutting that one section. If the grain more or less uniformly runs from one side of the board to the other then you should orient the board so that the grain is pointed away from you.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.