Board Thread:Game Discussion/@comment-37787052-20191120112540/@comment-3157402-20191222145004

Engine 999 wrote:

Sure that IPv6 is the source of the issue? Yes, as I can still reproduce the exact symptoms when I re-enable IPv6 (i.e. cloud save failing at first but recovering if I wait for a few minutes) and they're gone when I switch it off again, I'm absolutely sure it's an IPv6 problem, and since I verified that just a few minutes ago I'm also sure it hasn't been fixed yet. As I already used several services over IPv6 both in- and outgoing on a regular basis for years before without any problems whatsoever, I'm quite confident it's not a problem with my networking equipment either.

That being said, I never experienced to have no ghosts in WTTT, so your problem is probably different from mine. As an educated guess I'd say it could be a simple NAT issue, which might be caused by your home router, but also by an IPv6-connection using DS-LIte as well, as DS-Lite uses a CGN (i.e. a Carrier Grade NAT that can't be configured by yourself) for its IPv4 connection again. In the latter case disabling IPv6 in your home router would also have no effect whatsoever, which would fit the symptoms you describe as well.