Mapping faces from a plane onto another plane

I'm trying to make a function that "wraps" a plane onto a plane or onto a curved surface. It works for curved surfaces :

    const targetWrap is WrapSurface = makeWrapSurface(context, definition.target);
    const sketchPlane is Plane = evOwnerSketchPlane(context, { "entity" : definition.faces });
    var result is Query = qNothing();
    if (!isWrapPlane(context, targetWrap))
    {
        opWrap(context, id + "map", {
                    "wrapType" : WrapType.TRIM,
                    "entities" : definition.faces,
                    "source" : makeWrapPlane(sketchPlane),
                    "destination" : targetWrap
                });
        result = qCreatedBy(id + "map", EntityType.BODY);
    }
    else
    {
        const targetPlane is Plane = evPlane(context, { "face" : definition.target });
        const moveFaces is Query = qEntityFilter(definition.faces, EntityType.FACE);
        const planemap is Transform = transform(sketchPlane, targetPlane);
        debug(context, moveFaces, DebugColor.RED);
        opMoveFace(context, id + "map", {
                "moveFaces" : moveFaces,
                "transform" : planemap,
        });
        result = qCreatedBy(id + "map");
    }

The result when extruding the query `result` is somewhat strange (moved from a plane to an offset plane) .

I'm sure there's an obvious solution, but for now I don't have a clue.