Hmm, no modifications really, just one change to a preprocessor for ALINE related code (Aline URP Render Pass Warning Spam in 5.4.6 with Unity 6.3 URP Version 17.3.0 - #9 by HanHan)! There are diagonal connections enabled on the nodes.
Before we tell the entity to go to this spot we do check if the path is possible using
return PathUtilities.IsPathPossible(nodeA, nodeB);
Where nodeA and nodeB are the node the agent is starting on and the destination respectively. If this was false they wouldn’t even be trying.