i’ve been running dnsmasq (on alpine) as the dhcp for my local network since 2019 and i never had trouble.. hope you can figure it out

# relevant-ish excerpt from my config, although i doubt it helsp anyhow
port=53
listen-address=192.168.250.1,192.168.251.1,2a0d:eb00:8006:1,127.0.0.1
bind-dynamic
#interface=br0
#except-interface=br1,eth1
dhcp-range=interface:br0,192.168.250.24,192.168.250.224,24h
strict-order
# (...)