Game crashes for no reason

After many days after updating to 1.16.40 hotfix the game crashed for no reason I checked any curropted files or missing files or any other problem but it is still happening I also checked wether storage is enough and any other problems in the code of the game but I can't find any. the game keeps crashing before these crashes happened there was another crash in which where you couldn't open minecraft until you go online I went online and opened it and it just crashes it is stable for my phone because I checked. Another thing is that it only happened after I gave 3 days gap to the game and after those 3 days I opened the game and it crashed and I also searched for any new update because if I don't update the game sometimes it crashes. But there weren't any of the new updates. I also checked if something was missing but there weren't any and I only play vanilla minecraft and I have no mods on the world. So please check the problem, thank you