Gutter-restrict shouldn't have any effect on lines if the corresponding gutter type is none.

See the table below:

#tablex(
    columns: 3,
    auto-lines: false,
    [a], [b], [c],
    hlinex(gutter-restrict: top),
    [e], [f], [g],
    hlinex(gutter-restrict: bottom),
    [d], vlinex(gutter-restrict: left), [e], vlinex(gutter-restrict: right), [f]
)

It renders as follows (note the missing hline and vline):

(The output is correct for non-none gutters, but not if gutter is entirely disabled.)