Me and my friend (of whos name i will not share for privacy) and I went through the end portal after beating the dragon (to the overworld) and he jumped in first. All the sudden he is frozen with the death screen but he had no option to respawn or go to main menu. and at the bottom it said Generating world. after waiting 10 muinets nothing had happened he lost all his loot and we sadly will not be able to use the end.