I will add screenshots showing the problem which solved by mod within 1-2 weeks.
Now there's no time, I'm sorry.

Your description is good, TU. This is such a familiar effect that I have never thought of it, as when a worker or secondary settler, or even a prophet or missionary happens upon a barbarian, yet I find this to be acceptable insofar as it often has consequences that are realistic. When my worker or prophet is unexpectedly captured by a barbarian, or by a warring opponent this is realistic. The effect on the opponent is similar, as when a worker or settler happens to reveal an opponent massing for invasion just out of the view of my city.
Am I understanding what you are talking about?
If this is proper cause and effect for a scout why not for a worker or settler or religious agent?
If I misunderstand your intent please correct me.
I do see that this would tighten up the rigor of the gameplay somewhat.

The most common methods of use:

- On the zero turn when there is still Settler, but not worker - to determine the location of city-states (they also have only one Settler, which next turn is converted into the city)

- In the initial stages of the game to determine the barbarians coming to the city and reveal sudden opponents attacks.

- Finding the enemy submarines, not meeting them, and even without building own submarines or destroyers.

We came to the conclusion that disabling this feature will make the game more interesting, honest and similar to reality.

Hi!

Thank you for your comment.

This mode is still in the alpha phase. We test it in PBEM games in the Russian-speaking community on the site civfanatics.ru.

I'm not very good in English, but I'll try to explain in more detail.

When civilian units make path finding (by pressing right mouse button) outside the visible area, it reveal location of foreign units, showing their positions with a red circle icon. I think this opportunity is a bug, because opens hidden information for the player who us it.

Bug? Please explain so a simpleton like me can comprehend. Your description is not explanatory, not very descriptive either, or maybe I am just too stupid to get what this may or, probably, is not meant to correct or improve or help or aid or assist or make better.