I play Minecraft windows 10 beta and just recently downloaded the 05/07/2020 update. Before the update, I had a prebuilt nether portal from the same world of a previous version and after the update the animation would function properly with the whole wiggly screen and music getting louder but when I was supposed to spawn in the nether the whole app crashed. It happened two or three times then resolved itself then functioned properly for about an hour and a half then started crashing again when I would try and use the nether portal going both ways.