I'm back with an update on my AC 3200. After a little more than 48 hours of completely solid uptime, my 2.4 GHz network has just recently started dropping connection every 30 seconds to one minute. After about 30 seconds my printer seems to reconnect then go out again a few seconds later. While all of this is going on my 5 GHz networks are not affected at all.
Here is my log file,
This is almost identical to what i saw. Some sort of DHCP loop over and over. Try turning off your printer or move it to the 5ghz band if it supports it and see if that stabilizes your 2.4Ghz. I tracked down every device that showed these symptoms and moved them off of my network to stabilize 2.4ghz band. I actually had 4 or 5 devices showing these symptoms. You only seem to have the one. Another option to try is to statically assign an address in the printer to see if that helps and exclude it from your dhcp address range.
May 26 00:46:42 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:47:02 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:47:02 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:47:22 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:47:22 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:47:42 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:47:42 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:48:59 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:48:59 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:49:19 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:49:19 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:49:44 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:49:44 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:50:20 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:50:20 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:50:51 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:50:51 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer
May 26 00:51:06 dnsmasq-dhcp[302]: DHCPREQUEST(br0) 192.168.1.4 6c:3b:e5:00:0f:48
May 26 00:51:06 dnsmasq-dhcp[302]: DHCPACK(br0) 192.168.1.4 6c:3b:e5:00:0f:48 Printer