https://www.polygon.com/2018/10/6/17945702/pubg-pc-update-22-desync-ping-rollback-region-lock-china

Many PlayerUnknown’s Battlegrounds players on PC are rebelling against the game’s latest update, which has altered matchmaking and introduced unintended consequences upsetting their experience.

At issue is PC update 22, which rolled off of test servers and into the full game earlier this week. In addition to introducing a new ranking system, it also locks players to the region where they sign in. If they’re playing with a player from another region, the game itself will determine the best region to play on and send them there.