I get the same thing. With the A/C on, the engine restarts on it's own after about 20-30 seconds depending on how hot is is outside.
Engine restarts due to A/C load seem to be really rough, the whole front of the car shakes. It's much rougher than even starting the car cold. I have no idea why.
The normal foot-off-the-brake restarts are much smoother after the car got the software update last month.
For now, I'm leaving ASS off when I have the A/C on. I'll turn ASS back on on once it starts cooling down here.
I'm also going to mention this rough restart on A/C again to the SA when I take it in next. It's not a big deal to just leave ASS off for now.