This issue was present before with regular spotting but it's definitely problematic and even more obvious with the enemy acquisition icons introduced in 5.2. Smokes are blocked by a simple sphere that blocks icons, spotting, aim assist etc... in the sphere.
The problems that we have is:
- The smoke visual effect is not a sphere and it's likely that the sphere does not block the edges of the smoke as a result.
- The smoke visual effect is affected by wind a lot but the sphere will remain at the same position (especially when the current weather is storm)
- The sphere does not really change size similar to what the smoke visual effect is, this means the sphere is often "removed" early on and while the visual effect is still active, it's not blocking anything anymore.
- Certain smokes actually just don't block spotting/icons at all (will be solved in a future patch)
I've been looking at improving the occlusion of icons/spotting etc... those days so there will be improvements to that in a future update.