I've reported back in June 2019 IPv6 related issue...

I've reported back in June 2019 IPv6 related issue on their Magic 2 product. Technically transit IPv6 neighbor discovery is being discarded by their product. As of today (end of January 2020) no fix exists. Devolo support is not willing to give any fix timeline neither information whether the issue will be ever fixed.

For now I'd suggest to stay away from their products. No support for IPv6 in 2020 is bizarre.