Turn order in battle.

There were times when neutral creatures wouldn't attack a very strong stack or even a single unit that was deliberately left exposed to avoid being targeted. But that's just how it is...

Here's what happened:
160%. The morale of the Trog was affected - wait, the Naga's morale is affected, the Trog moves forward, the Naga moves to them. _Right up close_.
Tried to replicate it - the morale effect doesn't repeat. The "system variables" must be different now.