effects builds prior to 2.7.15-2_r15599
EDIT20210204: option1 now off image / repos removed today
OPTION1: just-login/via DAILY-UPDATE-CHECK
OPTION2: UPDATE-DNSMASQ-HELPER-STANDALONE
one-liner
curl -sSL https://raw.githubusercontent.com/wulfy23/rpi4/master/utilities/dnsmasqfix.sh > /tmp/dnsmasqfix.sh; chmod +x /tmp/dnsmasqfix.sh; /tmp/dnsmasqfix.sh