Boss is out of reach

I encountered a situation where the boss appeared in an area of ​​the map that was inaccessible, making it impossible to close the map.

A screenshot of this state is provided at the link:

https://drive.google.com/file/d/1lvrm6_42hnZuyifUxLKe6HoRry3MEbd2/view?usp=sharing

Later I managed to solve this problem: I went out to the shelter and returned to the map, the boss was moved to me - it turned out to be a flying monster. It's strange that it was not immediately moved to the reachable zone.