Seem like the key is IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
Similar things happened on GL-MIFI. However, Pixel 6 doesn’t have issue with GL-MIFI but a Samsung smart plug has issue with GL-MIFI. I also have to shutoff IPv6 to resolve the problem. The difference is this only happend on Version: 3.211 GL-MIFI but completely fine on Version: 3.203