Disconnects in the first few minutes

Hi guys, i have experienced some disconnections in the first 20~30 minutes everyday in the game, though my internet seems to be fine. I've seen a friend who just begun on the server few days ago and he had those problems too, i just wanted to know if this is a common thing or if there's something i can do. I don't have premium yet and i'm playing from Brazil, there's no lag, i'm just disconnected out of nowhere and after some minutes seem to stabilize.

Hope to get an answer, have a good one and take care <3