Minecraft lags everytime i autosave

ever since the 1.18.30 update, my minecraft survival world of 1 year (today is actually the anniversary) starts to freeze when autosaving, and disconnects all players from the world (except for me obviously because i'm the one who created it) most of the time, the freezing will  last for time intervals of 10 seconds - 3 minutes. idk what's going on but i'd really like it fixed, it's been on here to long to be "looked over." i have tried restarting my switch, signing out of the microsoft account, and even disconnecting my nintendo account, nothing will work. please fix ASAP.