Albert -
I too never noticed a problem using outer bevel on inlets, but there is also an alternative school of carving and inletting tecnique that might further address your concerns.
Instead of stabbing in the outline first, and worrying about the bevel crushing fibers or sliding in the wrong direction, some promote first removing waste wood very near to, but not quite up to, the inlet margin with, say, a largish shallow gouge.
IOW, FIRST scoop out a channel of wood at the red areas in the lock inlet below, very near to the pencil line.
Then, when you subsequently stab in the outline, the thin ridge of waste wood on the inner side of the inlet has a void to freely move to, helping promote a more true stab cut.
I think this is mostly promoted for relief carving by some, where you would remove the background very near to the margin of the design, before stabbing in the actual edge of the design.
Having said that, I've done it both ways (stab first or stab second), and for an inlet, I've never noticed much difference in the final job.
/MM