I think @fatcat is using one of the scenarios under the "Views" scenario. In that scenario, Atlantis takes off with no ignition and falls back down to Earth. I will use it as an advantage to send Atlantis into higher orbit (with a precise timing for ignition of course).
Oh, your case is opposite to mine. In my installation, Atlantis launches by itself straight away without thrust and falls back through launchpad mesh in the Views/Moon through Atmosphere scenario, which worked fine for you.
I tried the Views/Moon through Atmosphere scenario and did something hillarious.
Sunken Atlantis. Trying to fly the vehicle as soon as I unpause the scenario. If I don't try to fly it, it would be flying without thrust.
Aerial view. The contrail looks straight to the pad.
Aerial view. The contrail no longer looks straight to the pad. OV-104 looks more like hovering than taking off.
I just ran the default Atlantis launch into sunrise. The shuttle was on the pad. On the one where the shuttle falls thru can you post the log. The touchdown points get changed if on the launch pad.
Attach manager will affect the MS2015 guidance. But this is the default shuttle
As soon as it happens again I will post. It's stopped it for the time being and I can't reproduce.
soumya-8974, could you post if it's still happening on yours.
I have messed around with Extra/Orbiter Shutdown Options when it was playing up, but this didn't have any affect.
How weird that it has the issue for ages, then fixes itself.
Could it be that the shuttle is Landed Earth at an altitude of 47 m, unattached to a pad, that it can have problems?