Loading Into Worlds

Hello, I am having an issue loading into my survival worlds.

I would like this issue to be resolved as it has only been a recent problem after the 1.17 update. I have also updated it and my worlds are unable to load. I can only go into servers. My worlds sometimes load after 2-3 hours of waiting. Please resolve this issue because I have paid for this game and it is completely unfair if I can not even play it. Thank you.