Bug WebPath getNext() randomly returning null

I recently started creating a bot that simply buys select items at the Varrock General Store and banks them for a cheesy and low cost way of getting some starter cash. However, I am experiencing and issue that involves my path occasionally returning null for seemingly inexplicable reasons. I have been searching around for a solution but if there is already a solution posted somewhere I haven't had any luck finding it. Let me know if I'm doing something wrong.

Code (Text):

1. public class GoToBank extends LeafTask {
2.     private Path path;
3.     private Coordinate bank = new Coordinate(3183, 3436, 0);
4.  
5.     @Override
6.     public void execute() {
7.         path = Traversal.getDefaultWeb().getPathBuilder().buildTo(bank);
8.         if (path != null) {
9.             path.step();
10.         }
11.     }
12. }
13.