@Mojtaba, it is probably changed to “min-height: min-content”, https://drafts.csswg.org/css-box/#min-max
@Ilya, as far as I know spec doesn’t support multiple values for “display”. For “flex-flow: column” you will need “display: flex” what means the extra Element. And if you have thousands such DOM elements, it will impact the performance.

“min-height: min-content” perhaps would be the best approach for spec.