So a weird thing I noticed since the beta is that the smoke seems to have collision when it comes to calling airstrikes.
It's really quite irritating when you want to call in an air strike on a certain position, but apparently the smoke blocks your resulting in you calling in an air strike on where the smoke is. If you're in the smoke, you actually call it in on yourself.
You can even see the yellow / purple / green smoke floating in the air, after the smoke clears, showing where you called in the air strike.