I play multiplayer regularly, and think I have experienced a problem with units that will move to approach a unit that I have told them to attack instead of firing upon it (in ranged firing mode). I think this happens fairly often and requires me to correct when it happens. I am suspicious that this could be my own mis-clicks, but I have definitely experienced the icon of my mouse changing to the 'move to' icon instead of attack icon when hovering over units. I understand that this is supposed to happen if something is blocking the LoS of a unit, but am pretty sure this has happened in situations when a unit will not stop and shoot, but continue to walk in to the unit at point blank range.
I am certain enough that this is a real problem that occurs in multiplayer gameplay to make this post. If anyone else thinks they have experienced the same, please corroborate.
Will see if I can capture gameplay footage of this occuring.