There was a problem that Wi-Fi router's Internet connection was cut off due to Chromecast · Google Home malfunction

byEricaJoy

A problem has been reported that the Wi-Fi router's net connection may be disconnected when Google's Chromecast or Google Home goes back from sleep. Although it is said that the cause is a malfunction of the "cast" function, some routers have resolved the problem by updating.

Confirmed issue with Google Chromecast and Google Home ences temporarily Wifi drops around the world - Myce.com
https://www.myce.com/news/confirmed-issue-google-cast-causes-temporarily-wifi-drops-around-world-83428/


According to the equipment manufacturer's TP-Link, Google's Chromecast and Google Home are sending packets at regular intervals of 20 seconds to maintain connection with Google's service, but OS update around October 2017 After that, when the terminal shifts from the sleep mode to the normal mode, it seems that a large amount of packets may be transmitted in a short time. The longer the sleep time is, the larger the number of transmitted packets increases, and if "packet burst" exceeding 100,000 packets occurs, ultimately there is a risk that the main function of the router including the wireless connection will go down.

Rebooting for memory release is necessary for problem solving. As a symptomatic treatment, by disabling the "cast" function of Android device, we can reduce the influence until update by Google is done.

TP-Link wireless LAN router "Archer C 1200"We received a lot of reports from this user, confirmed this phenomenon, and updated the firmware for problem solving.

Archer C1200 WiFi Disconnects Issue and Resolution - TP-Link
http://www.tp-link.com/us/faq-2050.html

Likewise, Linksys also distributes WRT 3200 ACM and WRT 32 X firmware.

WRT 3200 ACM and WRT 32 X Firmware update available 1 - .... - Linksys Community
http://community.linksys.com/t5/Wireless-Routers/WRT3200ACM-and-WRT32X-Firmware-update-available-1-11-2018/td-p/1260723

Since ASUS, Netgear, and Synology routers are reported to have similar problems, if you know something, you should check the official website for manufacturer firmware updates.