I've been playing minecraft for years now, and yesterday came the update of Minecraft Bedrock's 1.16.200. Yesterday I opened the game but when the app opened it did not appear the screen with the words MINECRAFT and the menu "Play", "Settings", "Marketplace". By guessing I was able to access the list of worlds and open one and the scene that appeared to me was tragic. The whole world is full of lines and is unplayable. I hope you can resolve this as soon as possible. I also take two screenshots of you.