[1.4] [Bug] Attacking also gives a move order, can cause unit to move into a square with an enemy army

I hadn't noticed this in 1.3 or earlier versions, but ever since installing the 1.4 beta patch, I've noticed when right clicking an enemy army in an adjacent tile, it sometimes triggers a move order simultaneous with the attack order.  It recently did this and actually moved my army into the tile in which I destroyed one enemy army, despite a second enemy army occupying the tile concurrently with my moved army.