I went to farm nether skulls in a fortress, wich i had explored before, in this same version
If I try to pass a certain point in a corridor, i have a small frame drop (about a second- a second and a half) and from there, nothing works
I can t open chests, I can break blocks but they will not be dropped, I f i try and fly away, everything seems normal, until i land, but instead of running or walking, i m zooming on the floor with the elytra 
If i try to Save and quit to title, The "Saving world..." screen freezes, and the only way to exit the game is to stop java from task manager
I can get back to the overworld without problems, but almost all my nether stuff is in that part where it bugs
In the normal dimension i don t have anything like that, and i ve never experienced something like this before
Is there anything I can do to repair my world??