There is a bug in Offset which causes erratic behaviour if the offset-distance is chosen so that it exactly matches the offset-distance of a LINELINE or PARA_LINELINE edge (these edges cannot sensibly be parametrized with the t-value). The correct behavior is probably not to output an offset loop at all for this t-value.
There is a bug in Offset which causes erratic behaviour if the offset-distance is chosen so that it exactly matches the offset-distance of a LINELINE or PARA_LINELINE edge (these edges cannot sensibly be parametrized with the t-value). The correct behavior is probably not to output an offset loop at all for this t-value.