[Kelan]

I had a similar thing happen in a recent game playing as Man with my longbowmen. They were surely in range, but would move up to get in better position to fire.

This only happened after my army got quite large with many vine ogres as my front line. It seemed as if they were trying to get line of sight and perhaps the vine ogres were blocking their view. Their target assignment (closest) had approached the vine ogres at the time.