Asus RT-AC87U FW 378.55_0: Changing mac = fail + IEEE 802.11h support enable = fail

Hi

I can't change the WAN-MAC-Address:
After applying the Gui shows the new mac, but it isn't changed on the WAN interface.

I can't enable IEEE 802.11h support for 5G-WLAN:
After appllying, the Gui shows "disabled"
I can't find any log entries.

Thx, for your help.