Transferring Worlds via XB1 to BT “Minecraft."

Hello, i believe i found a bug in the current version for transferring worlds from XB1 edition to the new Better Together Update release of “Minecraft”. When i go to transfer over my XB1 version of my world and it is complete i load it up and tons of chunks are missing and replaced with new chunks, making my world have half buildings and missing structures completely. Thus making my world unplayable. I have tried all trouble shooting measures of copying the save on XB1 version to deleting the world and trying again in the bedrock version and more. I have not gotten any results. I also noticed other people in the community are having similar issues.

Thanks a bunch,
Taylor