Sometimes when waking up from sleep my network icon thinks it is offline, and I have to disable, and then enabled nextdns again.
There seems to be an open issue in the their GitHub page with a potential fix(I think?) here. Don't know if it work for sure though.
See if my post helps: https://help.nextdns.io/t/x2hlabl?r=35hfm57 It's about adding Global DNS option to the mechanism that maintains the Network Status Check Indicator (ncsi) taskbar icon.
tags: ipv6.msftconnecttest.com msftncsi.com
Mole you can ignore the network icon, but besides that, i recommend to use the dns ips if your pc is on a home network and not going outside