RT-AC66U running fw 220.127.116.11.246.20 (Merlin), strange behaviour: My wired clients get ip-addresses and also one laptop on wifi 5GHz. But all clients on 2.4GHz cannot get an ip-address. They seems to connect correctly (using WPA2-personal) and I have checked that they have the correct key. But they don't get an ip from dhcp. There is no entries in the General log when they try to connect (no DHCPREQUEST etc), but when I look in Tools|Sysinfo it lists 2 Wireless clients on 2.4GHz (Associated 2 - Authorized 2 - Authenticated 2). I have tried to restart the router and the devices but to no avail.