lan IPv6 leases attributed to WAN interface

[sockpuppet0]

Hi.  Running DHCPv6 on lan interface.  WAN gets IPv6 addresses via DHCPv6.
I have a /48 from ISP but I request a /56 on the WAN.  I get xxxx:xxxx:xxxx:0::/56.

xxxx:xxxx:xxxx:3::1/64 is statically allocated to the lan, and I run DHCPv6 on it handing out ::8000 thru ::87fff.

When I check my leases in the DHCPv6 screen, I find lan devices claimed by WAN interface.

If I edit the entry to assign a different IP6, it "succeeds" but the edited entry disappears.  Not found any more in the leases screen.
Not found in the DHCPv6/lan screen.

Currently, there is no Services/DHCPv6/WAN screen.
Previously, I was using static initialisation of the WAN interface for IP6, and there was a Services/DHCPv6/WAN screen.

I never enabled DHCPv6 on the WAN, as it made no sense.

Anyone else seeing this?