IPv6 over PPPoE stopped working

[RoelVB]

Hi all,

I have an PPPoE WAN with both an IPv4 and IPv6 block. At some point, unfortunately I don't know when exactly (could have been an update), IPv6 stopped working.

My WAN config:

IPv4 configuration type:	PPPoE
IPv6 configuration type:	Static IPv6
Static IPv6 config
IPv6 upstream gateway:	Auto-detect
Use IPv4 connectivity:	Checked

The PtP log shows: "[wan_link0] rec'd unexpected protocol IPV6CP, rejecting", which would explain IPv6 not working, but what does the error mean exactly and what could be causing this?

[RoelVB]

In case someone stumbles upon this thread.
I've found the cause and reported about it on Github.