Started finding this bug in 1.16.100, but now with 1.16.200 out it happens every time. I will now explain the bug. This bug happens when you try to load into your own world. The green progress will fill up to the maximum and it will stay put on generating world... I waited 30 mins and it was still not loaded in. I next tried turning of my resource packs (at the time I had a shader and texture pack enabled) Still didn't load. I'm pretty certain that this is a bug and not an issue with my device, cause I got a brand spanking new iPad and my friends who also use iPad were having the same issue. I hope I made this as informative as possible, cya!