BSS 4.1.4 not recognizing css rules for Orphans and Widows

currently Chrome is experiencing a regression wherein @media (min-width: 992px) { .card-columns { column-count: 3; column-gap: normal; } }

is not working, and it is necessary to add orphans: 1; widows: 1;

to the css in order to get a 3 column .card-columns to function correctly.

however BSS is marking that css as invalid (though it is including it in the generated stylesheet, so that's fine) with the red-line strikethru.