[FS#964] odhcpdIPv6 node(Win 10) stops sending Router Solicitation but it still receives RAs from LEDE

[LEDE Bugs]

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FS#964 - odhcpdIPv6 node(Win 10) stops sending Router Solicitation but it still receives RAs from LEDE
User who did this - forfree (freefor)

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Some changes from last time:
-new build r4707-3e6d303d61
-dnscrypt added

I attached pcap from WAN and Windows 10 machine.There is also an ipconfig output when IPv6 is working fine.

UTC 19:23 - Started capturing
UTC 21:12 - I checked with ipconfig and the IPv6 default gateway was gone. I redid again ipconfig and it reappeared.
UTC 21:19 - IPv6 default gateway is gone and it never came back(waited 10 minutes). 

Unfortunately I forgot to increase the system.log max filesize and I miss a large amount of odhcp debug(PART1 UTC 19:25 ~ 19:38 and PART2 UTC 21:28 ~ 21:30).

I won't be able to do other tests until 27th August but let me know what do you want me to do.

Thanks.

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=964#comment3275