I'm on Xfinity too, but most..if not all my disconnects are Magatsu related or joining AQs with alliance members. That being said, I still do occasionally just get a random error 630 for no particular reason, happened earlier today in the lobby. I've since eliminated that its my router and modem at fault, since I replaced them both with brand new ones with new cables so for my personal issues, its 1 of 3 things now.
@Joshofcamalot Normally a random error 630 would definitely point towards ISP or equipment issues, the players that are getting them at very specific points are most likely server or bugs causing it. My wife stopped playing because she couldn't group up with me without her getting error 630 when changing areas, and we're on the same network!
Server issues, possibly software bugs.
Comcast issues, it's comcast and their service isn't as reliable as they claim.
Routing/peering issues, this is the hardest to fix unfortunately because if its the backbone...getting that fixed requires a lot of angry rants and threats usually to get a backbone provider to fix the problem
Covid-19 situation isn't helping, and that has caused significant increase in demand, and that causes a lot of issues too. This link shows the amount of packet loss since March and its quite significant.....packet loss and PSO 2 are big problems, and definitely could cause error 630s, I notice packet loss on Magatsu phase 1 when attacking and the boss will suddenly shift several spaces forward quickly as it re-syncs.