Late last week, an issue came to light that causes WiFi networks to be killed. Initially it appeared the problem is with Google Home Max smart speaker, and is affecting only TP-Link routers (specifically the Archer C7). But now, with more users reporting their use cases, it seems the issue is more widespread than what we initially thought. Not only users with different TP-Link routers, but even those using Linksys, Synology, and other routers are also reporting the same problem. And in addition to those using Google Home Max, users with other Home devices (and even Chromecast...
Source: https://www.gsmarena.com/googles_wifi_killing_issue_appears_to_be_more_widespread-news-29151.php