Ships occasionally take random headings in pre-control phase

[rimbecano]

When starting a battle, a division will occasionally head off on a random heading instead of its initial heading, and this continues until the pre-control phase of the battle (where ships maintain their initial headings and the player cannot give course orders) is over. If it is my lead division, the whole force follows it, and this can lead to failure to make contact with the enemy. If it is a following division, it can lead to significant disruption of my force by the time the enemy is sighted.

I'll not that the ships involved generally are *not* carriers (where it could be explained in terms of course changes for flight operations), nor are they conducting seaplane operations.

This occurred both before and after updating to 1.02.