Kerbal Space Program

Hi,

In the VAB, when shift-moving certain part combinations, all the parts disappear.

Steps to reproduce:
- Start new ship in VAB.
- Add a Probodobodyne HECS as first part (also works with OCTO).
- Add a Mk1-3 Command pod underneath the probe core (also happens for the Mk3 Cockpit, but i.e. not with Mk1 Lander Can).
- Move both parts by shift-selecting the Mk1-3 Command Pod, move it somewhere else, release.

Results:
- Both parts disappear, but they are still somewhat present, as adding another command module behaves differently than with an empty VAB.
- Starting a new ship construction or loading a saved assembly works, but launching the invisible ship fails, and trying to exit the VAB without resetting it (via building a new / loading an existing ship) results in a complete lockup of the game. The dialog asking whether to save the ship appears, but selecting "do not save" does nothing.
- KSP Log shows the following lines:

[LOG 02:25:43.714] mk1-3pod added to ship - part count: 2
[EXC 02:25:45.761] NullReferenceException
UnityEngine.Object.get_name () (at <7d9ec060e791409ab3eb85c61e312ed6>:0)
PreFlightTests.StationHubAttachments.TestCondition () (at <dc0e5f458c0f4571ad839b9c4153f347>:0)
PreFlightTests.DesignConcernBase.Test () (at <dc0e5f458c0f4571ad839b9c4153f347>:0)
KSP.UI.Screens.EngineersReport+TestWrapper.RunTest () (at <dc0e5f458c0f4571ad839b9c4153f347>:0)
KSP.UI.Screens.EngineersReport+<RunTests>d__49.MoveNext () (at <dc0e5f458c0f4571ad839b9c4153f347>:0)
UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at <7d9ec060e791409ab3eb85c61e312ed6>:0)

I tested this with a completely fresh install of KSP plus both DLCs, no mods, default config except fullscreen and screen resolution.

Versions and system:
KSP 1.11.2.3077 (Linux version)
Making History 1.11.1
Breaking Ground 1.6.1
System: Gentoo Linux 5.10.27 64bit, AMD Ryzen 2700, 32 GB RAM, AMD RX470 Graphics
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