lags in the first round after starting the game and after the map changes

Since about 1 month I have very hard lags in the first round Im playing after starting the game. When the round begins everything seems normal at the beginning until the drop ship starts, then my game frozes and after a few seconds there is an error. It takes like 30 seconds until I get back in the game but its lagging so hard that playing makes no sense. So since the start of season 10 I have exact the same problem after the map changes (only in battle royale). I looked everywhere for help and tried so many different things to fix it but in the end nothing helped.