I forgot to say ,i used 4.19.2 version，and it seems like some more bugs exist in this version,such like move between three tiles,like the picture i uploaded.The indexes of tiles are 12、13、27，and height impassable cut off is 300, the height between 27 and 12 is more than Height between levels, but the character can not move to 27, he can only move to 12 from 13.
Now i change the version 4.18.1, everything is fine.