Constant disconnects at the end of instances

For a while now, I've had the issue of the game losing connection to the server at the end of instances, specifically. That, or during key points, like after clearing out the Forged camp in Night of Fires. It doesn't happen elsewhere - when I just run around in the open world and such, it works fine. It also doesn't seem to happen in vanilla Personal Story. But I've had it happen to me during the final instance of the newest LS at least three times in a row.