As the gif below:
Nothing in the DHCPv6 setting page,I can’t add new clients but the prefix was existed in the pools and the address was pingable from public internet
So what’s the solutions to this strange problems? I try to export or print the configuration and there is nothing but an error 
Reboot already tried?
Yeah, restarting didn’t bring any good results
Same problem for months.
hap ax2, 7.16.
Introduced in earlier versions.
Do you have “detect-internet” active on any device other than “none”?
No, detect-internet does not contain anything except none.
I tried updating to the latest beta (7.17b4), but nothing improved. I still can’t find my DHCPv6 Client
