Steps to Reproduce

https://zkfiddle.org/sample/118bcv/2-ZK-4977
Run in Chrome 92 (Desktop)

Try using the Responsive view to modify the width to 768px and 414px.

Current Result

The @MatchMedia is working at the first time, but when the width is changed the @MatchMedia is not working.

Expected Result

The @MatchMedia is always working.

Debug Information

1. Since Chromium 92, it needs <meta name="viewport"> to enabled window.matchMedia changes. Not sure if it's a bug or feature yet.
2. It acts normally if a user resizes the browser window quickly.
3. Block zk.wcs (norm.less) and it runs smoothly.

.z-temp,
.z-modal-mask {
	//.size(100%, 100vh); // the problem line, use 100% instead of 100vh solves the issue
	background: @maskBackgroundColor;
	.opacity(0.6);
	position: fixed;
	top: 0;
	left: 0;
}

Workaround