Ok I am having issues similar to this since I started using Advanced FoW and DYnamic Lighting.
This is dynamic lighting lines drawn:
This is what that token can see (I selected it and pressed ctrl+L):
This is what happens when that token move in that particular square (ctrl+L ):
My answer: why the hell he can see that two squares??
This is just an example, as I told before I am having similar issue since the start of Curse of Strahd and it really hampers the usage of Advanced FoW to the point I am not using it anymore.
Is there a solution?