Entering nether portal crashes the game

Hi! There is a big problem connected with minecraft bedrock edition beta on Windows 10. I started my survival in version 1.16.0.55 before adding a new nether world stuff in version 1.16.0.57. After switching to a new version, when I try to enter the nether world portal, game permanently crashes. I think this problem exactly connected with new nether generation features. I tried all: building portal in air, underground, building it for far distances from my home, rotating it in different directions, deleting and installing again, but entering portal still crashes the game. I even tried to find the way to delete nether files, but it seems that it is impossible to do this on bedrock edition. By the way, it’s not clear why, because on java version you have an opportunity to wipe the nether, but here you can't. Please help with this, because this error breaks the game in its basis.