1. I play the game on windowed mode.
2. At the time I was deploying multiple missions throughout Kaizer's map.
3. First I sent two landers, then four probes. I would only wait for the loading screen to vanish to press the ESC to launch the next vehicle.
4. When I connected back to the landers the top of the atmospheric entry module was still on them and the landing sequence was working enough to safely land the landers.

I strongly suggest we add a manual override to forcefully decouple the atmospheric entry module in case anything happens. Using the Space key's options for example.

Not even very intense maneuvers were not able to decouple the top part.