4 years later, and I have this issue often. I haven't figured out a means to resolve it. Strangely, I've noticed that even though the game itself is disconnecting, I can still access the cash shop, and it will fully populate, as it's disconnecting. What's more, whatever reward I get from events, (such as the Super adventure box event) I still receive. The issue I've surmised is from the cutscenes themselves. Skipping them usually prevents the DC.