For the past couple weeks the minecraft world I have has been lagging everytime the autosave icon appears. Also blocks do not appear when broken for a few seconds. Another issue is it can take up to 15 seconds sometimes to open a chest or open my inventory, and it just displays the loading animation. 

Also recently the past 3 times i have reloaded the game it has crashed within 30 seconds i believe due to this autosave. Other issues ive had include invisible walls that my horse in game has got stuck in forcing me to reload which would fix the issue. Also another really weird issue is I have re-opened the game and even though i saved and quit the game at my house it kills me on reopening at a location I previously died. It happened another time when I was forced to re-log due to an invisible wall glitch.

I believe that all or most of these problems are due to an auto-save error when playing docked on the Nintendo switch. Thank you