Someone care to genuinely explain to me the physics behind Bangalore smoke?

The issue for lack of a better word, has always been there with bang smoke, the issue that @pandareno1999  mentioned just heavily exasperated it.

What your enemies will be seeing is a flash of your silhouette, which is just enough to track your movements. I'm not sure if it can be manipulated as the criteria of distance etc seems to just change at random. I think the time the smoke has been active also plays a big factor.