@stephenw10 @JKnott
Ok, so its still going down. These lines in the log look like the start of the problem:
192.168.1.1 3/22/2020 19:21 local7 err dhcpd icmp_echorequest 192.168.1.218: Host is down
192.168.1.1 3/22/2020 19:21 local7 debug dhcpd reuse_lease: lease age 346 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.1.204
full log here: https://pastebin.com/zs2JhtCS