At all here , besides speed limit , me not help not with anything.
I sayd about bug in interface - to me say what this normaly and fix not will be.
I sayd about bug in recive IPv6 - this also ignored and not fix bug. However I can recive IPv6 if ping 10 ms and more. But as do so that would router do reconnect till not recive IPv6 - to me not sayd.