Props Converted To Minis Lose Ability To Block LoS

Prop walls block Line Of Sight (LoS) visibility as expected. A player mini on one side of a prop wall does not see minis on the other side of the prop wall. This functionality works until the prop is converted into to a creature. Once this is done the prop loses its ability to block LoS.

Had great idea for a maze made of walls converted to minis so that the walls would respect LoS and thus only be visible if the player mini can see them. However since the converted wall prop no longer prevent LoS the concept cannot be used.  

To Reproduce
Steps to reproduce the behavior:

• Place player mini on board
• Place GM mini on board
• Place wall prop between the minis
• Player does not see the GM mini
• Convert wall prop to mini
• Player can now see GM mini