Hi,

Which firmware version are you using?
Which client adpter and driver?

I've tried both 130320 and 130424. The issue is present across all clients, windows, mac, android, iphone.

I've tried to find the non-beta version of 130304, since many on the forum reported that that resolved their issues, but I haven't been able to find a link to download it.

Did you disable IGMP Proxy ?

Yes. The issue seems to be aggressive releasing of IP addresses. From my system log:

153 Apr 8 02:08:55 DHCP NOTICE DHCPC Entering released state
152 Apr 8 02:08:55 DHCP NOTICE DHCPC Unicasting a release of 77.59.141.213 to 10.169.0.1
151 Apr 8 02:08:32 DHCP WARNING LAN IP and mask changed to c0a80001 ffffff00
150 Apr 8 02:08:00 DHCP NOTICE Dynamic IP(DHCP Client) obtained an IP successfully
149 Apr 8 02:08:00 DHCP NOTICE DHCPC:GET ip:4d3b8dd5 mask:fffff800 gateway:4d3b8801 dns1:3e0218a2 dns2:3e02113d static route:0
148 Apr 8 02:08:00 DHCP NOTICE DHCPC Recv ACK from server aa90001 with ip 4d3b8dd5 lease time 84617
147 Apr 8 02:07:59 DHCP NOTICE DHCPC Send REQUEST to server aa90001 with request ip 4d3b8dd5
146 Apr 8 02:07:59 DHCP NOTICE DHCPC Recv OFFER from server aa90001 with ip 4d3b8dd5
145 Apr 8 02:07:59 DHCP NOTICE DHCPC Send DISCOVER with request ip 4D3B8DD5 and unicast flag 0
144 Apr 8 02:07:59 DHCP NOTICE DHCPC perform a DHCP renew
143 Apr 8 02:07:57 DHCP NOTICE DHCPC Entering released state
142 Apr 8 02:07:57 DHCP NOTICE DHCPC Unicasting a release of 77.59.141.213 to 10.169.0.1
141 Apr 8 02:06:37 DHCP NOTICE Dynamic IP(DHCP Client) obtained an IP successfully