Anyone else seen this worker/unit bug?

[Kirel]

Apologies if this has already been discussed, but I've run into a problem where the Mech. Infantry fortified in one of my cities attacks all the workers that pass through it on the way to other parts of my empire. Since my workers are usually automated, I usually see about six of them all wiped out at once as they travel on my rail system to clean up pollution or make improvements. What could be triggering the city defenses to attack my own workers? Any thoughts? Thanks!

Kirel

[Lord Silvi]

Wow.
I have not heard of this.
And the patch list does not adress this problem.
I have mech infantry in my current game, but no problem with it.

[Kirel]

Not just Mech. Infantry

I've had this occur with other kinds of units fortified in my city, not just Mech. Infantry. It only happens with one city, strangely enough (though it's usually the main rail hub in my empire!) It's a very strange bug (and very annoying!)

Kirel