I recently (mid March 2020) downloaded Minecraft off the PS store.  I've started about 5 different worlds now, some with multiple days of effort put into them, and all have had the save data corrupt mid-game.  A message comes up saving the saved data has corrupted and to try an earlier version of the world.  I then get taken back to the home screen and can still go into other worlds, but the game won't let me into the corrupted world that kicked me out.  This doesn't happen after a power outage or anything like the other issues I've seen.  Minecraft takes up a little over 2 GB on my PS4 right now and the world's that have corrupted have all only been about 90 MB or120 MB on the most recent one.  I uninstalled Minecraft and reinstalled and then tried playing just offline.  That seemed to work for a bit but then it crashed again.  I can't tell if it's related to the maps I'm using, it seems to always occur when I have more than 2 maps or a couple level 4 maps fully filled out, but no idea if there's any correlation there.  Hopefully someone can help with this!