It just closes.
I have a Backup of this World where the Nether works just fine and the latest maybe 5 Backups where the nether doesn't work anymore and then crashes the game... I'll upload a copy of them as soon as i get back home.
Also i tried to open the world on the latest Version and the Experimental Version and both do not work either.
What kind of more information you will need? I gave u all the information that i have..
I don‘t want to reset nether chunks i would like to reset the whole nether. That was possible on the xbox one version and i would love to see that feature again or at least some kind of that feauture.