Resolved Collider Getting Stuck on Nothing?

I have a simple enemy that has pathfinding setup to follow the player. When the enemy gets close to a corner it does a collider cast to figure out it's next point of travel in the path. The collider cast doesn't seem to be hitting anything, but the enemy is stopped on the corners, and cannot move towards the next point in it's path, even though the collider cast returns blank, this could be caused by possible imprecision in the Unity collision system, but I'm not sure. Anybody have any ideas?

 

So the solution I ended up using is just rounding the corners of the enemy's collider, which has them sliding off the corner whenever they end up stuck, it's still not the solution I was going for, but it works well enough. If anyone has anything better please do share.