MCWorld file doesn't importing

In the new and latest Minecraft Bedrock version, I've encountered a problem when I import the world from external source. No matter what kind of .mcworld file it is – last version played, file size, complexity, active resource packs; still nothing.

It shows the message that the world is importing, however, there is no successful or fail messages shown – it just like a ghost – no results, didn't imported. I tried many times of different files but it didn't work. Even the worlds last played in versions 1.21.20 and 26.0, still nothing. The world import is normal before this update and it was immediate.

In the video attached below, I showcasing how it reproduce the bug. There is no cut, just a pure start from app launch. Also I deactivated all the active global packs to ensure no conflicts and pure vanilla.