Llama caravans refuse to pathfind down hills and around obstacles.

I was trying out the llama caravans but they would pathfind and fall in weird places like water lakes, and will avoid going up or down hills, they also move in wierd twisty directions when in theese conditions.
to reproduce, walk around in the extreme hills biome with a llama attached to a lead with llamas behind it, when walking around sloped areas and trees they will have weird pathfinding that makes no sense!