Line of Sight bug

I noticed this when using a tamed Wolf as a scout to reveal the map. 

My Wolf has 5 movement.  If I move my Wolf one step at a time,  the revealed map shows for each step.  I get a sort of thick column of map reveal.  

If I click 5 tiles away, the Wolf moves 5 tiles, and then the map reveals from that position.   None of the interim steps are revealed.   My Wolf stops looking where she's going just because she's running!  I get a new square of reveal instead of a filled in column of reveal. 

It seems to happen to any large movement unit.  The Wolf just seems to be a sort of worst case example.  Diagonal movement also aggravates the situation.