I've been aware of this behavior for a couple years, but the cause isn't technically a bug. It's a side effect of how the sensor works, and in rare cases (especially when moving fast) you can sometimes see things like this.
I should probably treat this as a bug (it's the kind of thing that'll keep getting reported if I don't
), though the reason I didn't do anything about it before is that it could require some deep system changes. This particular instance is also interesting since it looks a little different than the cases I've seen before, though I'm pretty sure the underlying cause is the same.
What happened on your next move? What happened when the turn counter flipped to the next turn? Were there actually two programmers there in the end?
It would help if I had a save of this. Did you keep it?