Its been occuring everytime an autosave happens.
1.18.30 fixed this for me
Lucklily i played minecraft switch even with this bug intact. As soon as it seemed like it was faster i came here. But Tovre's concern is very valid. This could very easily happen again.
After the switch update they had my game only took 30 seconds to load. Im not sure what it fixed to do thta.
New updates out and its still doing this. Its been almost a year come on
This happens to me too. Even just booting the game up takes awhile.
I've been having this issue on switch I seem to lose everything except a starting map. I close out of the world before it autosaves and try loading the world again and it seems to be fine.