Minecraft on Switch: We are still working on a fix. However, for a temporary workaround, try not signing in to a Microsoft account. While you won’t have access to servers, Realms, or possibly Marketplace content, you will be able to play single player & split-screen worlds. - HZ

So Mojang, I play Mc on ps3 and I've encountered this bug more than once in half of my Minecraft worlds. The game freezes when I press the load button. Its made me very mad because I had a good amount of diamonds worth days of mining and lots of cool builds in those worlds.