Objects ignore grid and make a "bee-line" for the destination node?

Hi,

I am having an issue where the following occurs.

I have a spawner that starts spawning enemies out, which for a while do what they are expected to do… Follow their path to the destination node. After a few minutes, the grid graph (while in “scene” mode), changes from its normal dark blue color to a bunch of different colors. At that point the paths start making a straight line for the destination, instead of staying on the graph.

There is only one type of enemy being spawned. This object is using Seeker, AlternatePath, and SimpleSmooth. It is part of the TDkit sold on the Unity Asset store… If any of that helps.

Any help would be great! Thanks!!

-Kory