[Christocipher]

You are not getting what I am saying. So in your example what you did not do is move the visible squad back out of sight. When you do that It WONT be visible but the foxhole WILL be.

So when the squad becomes visible it can then move somewhere where it is not visible anymore and it WONT appear on the map even though you saw it while it was moving to somewhere out of sight. BUT the foxholes did become visible when you saw the unit moving towards cover and stays visible permanently.

So the unit can be seen and then hide itself away again.
But once the foxhole is seen it is permanently visible even if the unit it is part of is back out of sight at the end of the turn.