1.1 64-bit early stages vanishing at launch

[Tomvreomfodj]

In 64-bit KSP 1.1, with only one mod (the docking alignment indicator) - launching a fairly large rocket (174 tons in 6 stages):

If I save and then attempt to load the vehicle, it shows up on the vehicle list as "116 parts in 13 stages", but there are only six stages on the sidebar.

I click "launch".  I go to the pad.  If I don't do anything for a few seconds, the spacecraft settles in.  It appears to be intact, but the first three stages disappear from the stage sequence on the left.  If I activate the staging sequence, I get the fourth stage.

If I hit the "stage" button before the rocket "settles in", stage one fires as it should, but controls then appear to be locked.

I have checked visually - in both of these scenarios, the rocket appears to be intact, just the controls are misbehaving.

If I leave the pad after the rocket settles in, then come back, the top half of the rocket falls to the pad immediately upon my return and lights everything on fire.  I do not see the bottom half.

The spacecraft in question has three probe bodies and no crew.

I have tried quitting and reloading, shuffling the stage sequence, and similar with no apparent effect.

Has anyone seen similar behavior?  Any idea how it might be fixed?

[Padishar]

It sounds like you craft is broken in some way so it would be most helpful if you could upload it somewhere and post a link so others can try it out.  Also, an output_log.txt file including one or more of these launch attempts would probably be helpful as would a list of what mods you have installed...

[KLHill]

I have the same problem. I have 14 stages, when I go to launch, initially all stages appear. Once the ships settles in, all but 6 stages disappear. If I leave the game and come back in the stages appear as they should, but only once. If I want to relaunch I have to leave the game again.

[Tomvreomfodj]

I never managed to actually prove it, since I modified the ship and the problem went away, but I think the problem was that the ship was breaking on the pad, as the first response to this post suggested.