There seems to be a bug in path generation

I created a simple demo that allows you to navigate an entity to a location by clicking on a point on the map. At present, during operation, it will be found that it is stuck：  there is the demo gist: [https://gist.github.com/w4ngzhen/c79aad970509ee91114f7158643120f6](https://gist.github.com/w4ngzhen/c79aad970509ee91114f7158643120f6)