OK thanks. That eliminates a couple of thoughts that I had.Code:
admin@RT-AX86U-AR28:/tmp/home/root# cat /etc/resolv.conf nameserver 127.0.1.1 admin@RT-AX86U-AR28:/tmp/home/root# cat /tmp/resolv.dnsmasq server=127.0.1.1
Are you getting any errors in the router's syslog when this happens?
I see you're running DNSCrypt-Proxy. I don't know anything about that so I can't help you there, but that's the next thing I would look at.