Minecraft On Windows 10 Will Freeze For Random Amounts OF Time On Random Auto Saves
I Have Asked In The Support Channel On The Official Minecraft Discord To No Avail
If Playing In Full Screen When The Game Freezes On An Auto Save It Will Darken My Screen And Then Become Pure White With The Only Way To Fix IT Being To Restart My Computer
Do you have sufficient storage space available for your saves? Have you also tried a clean install of the game? (Back up and data you don't want to lose, such as your saves, first.)