Asus has released a small bugfix update for the RT-AC87U router.
ASUS RT-AC87U Firmware version 3.0.0.4.380.3459
Bugfix:
– Fixed GUI issue in IPv6 environment.
Grab it here (select “Others” as OS version):
http://www.asus.com/us/Networking/RTAC87U/HelpDesk_Download/