[FS#1002] Dns ipv6 problem when interface restart

[LEDE Bugs]

The following task has a new comment added:

FS#1002 - Dns ipv6 problem when interface restart
User who did this - Ansuel (Ansuel)

----------
Ok this now i clear...
on the router there is a visual bug that sometimes doesn't show dns...
>From router i can ping ipv6 site even if dns are not showed...

problem is on pc... he gets ipv6 but no dns... (doen't get reannounced?)

here a good pcap  
----------

One or more files have been attached.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1002#comment3440