From https://chess.stackexchange.com/a/45638/19286:

Even if a disambiguated move is itself possible, it may be incompatible with checks/checkmates. Any move that can't possibly cause new squares to become attacked cannot cause check or checkmate. This is relevant if disambiguation in the move happens to make the start square and end square badly aligned with other pieces of the same type that must have been on certain squares, especially for queens. For example, Qb2a1 cannot cause new attacks because other queens must have been on b1 and a2 as well, so Qb2a1+ and Qb2a1# are impossible; same for Qc3(a1/b2),Qd4(a1/b2), and maybe more that I haven't found systematically. Edit: I'm not sure about bishops, as eg. Bc3b2 doesn't make the bishops attack more squares but may discover check/mate.