I try to open a world but it is'nt working

I tryed to open a world but it didnt work multiple times.
wat i was expecting was for my world to open just fine like all the other worlds that I have but it wouldnt

wat happend was that when i tried to open it it would either bring me back to the menu or to the multiplayer server select page. I dont no if its because my world file is corupted but it would be nice if it would work. and also when it opens (very rare and it take for ever) the game freeses (but it can still move and place blocks, so its kinda like when u have a relly bad connection to a server) when an action is made and the world wont generate

I dont know how to triger this bug, its only happening with one of my worlds. i tried to put my world in as an attachement but it wouldnt let me.