Still in corners of the maps it's pretty difficult to avoid. I lost a slightly damaged p4 once at the edge of crossing in the woods had full visual on the thing saw the smoke reacted the moment the smoke landed.
If we are talking about il2 precision i will like to point out that it is the slowest of the off map payload currently. IIRC.
I have used this ability on the edge of maps in 4v4. At one occasion, Literally opponent's tanks were hugging the map boundaries in lienne forest. But since he was paying attention he was able to save both his panthers.