Rescue Contract vanishing kerbal Bug

[StrandedonEarth]

KSP 1.1 build 1230, 64bit

I accepted a rescue contract around Minmus. I had a station contract going there (Bases and Stations contract pack), and fuel was low, so I got the station to rendezvous with the crew cabin without matching orbits, planning on EVAing Jocie and using her RCS to catch the station. But when I switched vessels and EVA'd her from the portrait window, she briefly appeared and then vanished, leaving behind the empty crew cabin. The usual rendezvous part of the 'contract complete' messages popped up, but she was gone.

When I went back to the space center, she was sitting in the astronaut complex, ready for her next mission, but she hadn't been recovered yet. So I stuck in a capsule, placed it on the pad, and recovered it, which completed the contract, but she never received the experience for her flight.

I don't need any help with this, as the contract did complete without the cheat menu. I didn't put it on the bug tracker, as I'm not sure it's repeatable (I didn't have a recent quicksave handy) But it is a bug, so here's the part of the log dealing with the rescue:

[LOG 16:38:51.633] [FLIGHT GLOBALS]: Switching To Vessel Jocie's Pod ---------------------- 
[LOG 16:38:51.643] [PlanetariumCamera]: Focus: Jocie's Pod
[LOG 16:38:51.656] [CHATR] Capsule starts the exchange...
[LOG 16:38:51.663] 4/24/2016 4:38:51 PM,KerbalAlarmClock,Active Vessel changed - resetting inqueue flag
[WRN 16:38:51.670] Updating
[LOG 16:38:51.695] 4/24/2016 4:38:51 PM,KerbalAlarmClock,Removing DrawGUI from PostRender Queue
[LOG 16:38:51.706] Added 4.198937 (5) reputation: 'ContractReward'.
[LOG 16:38:51.717] Contract (Rescue Jocie Kerman from orbit of Minmus.): 'Save Jocie Kerman' complete!

<color=#B4D455>£ 18,562   </color><color=#E0D503>¡ 5   </color>
[LOG 16:38:51.730] Contract (Rescue Jocie Kerman from orbit of Minmus.): Jocie Kerman is now part of the space program crew.
[LOG 16:38:51.744] 4/24/2016 4:38:51 PM,KerbalAlarmClock,Vessel Change from 'MinLab' to 'Jocie's Pod'
[LOG 16:38:51.772] 4/24/2016 4:38:51 PM,KerbalAlarmClock,Adding DrawGUI to PostRender Queue
[LOG 16:38:51.779] 4/24/2016 4:38:51 PM,KerbalAlarmClock,Skipping version check
[LOG 16:39:08.805] [F: 202825]: [04:20:16]: Jocie Kerman from Jocie's Pod went on EVA.
[EXC 16:39:08.830] NullReferenceException: Object reference not set to an instance of an object
	KerbalEVA.OnVesselGoOnRails (.Vessel v)
	EventData`1[Vessel].Fire (.Vessel data)
	Vessel.GoOnRails ()
	OrbitPhysicsManager.LateUpdate ()
[LOG 16:39:08.895] Packing Jocie Kerman for orbit
[LOG 16:39:08.913] ObT : NaN
M : NaN
E : NaN
V : NaN
Radius: NaN
vel: [NaN, NaN, NaN]
AN: [1, 0, 0]
period: 0

[WRN 16:39:08.921] [OrbitDriver Warning!]: Jocie Kerman had a NaN Orbit and was removed.
[LOG 16:39:08.927] Jocie Kerman Unloaded
[ERR 16:39:08.934] Infinity or NaN floating point numbers appear when calculating the transform matrix for a Collider. Scene hierarchy path "Jocie Kerman (Unloaded)/model01/female01/helmet01/helmetCollider"

[ERR 16:39:08.941] Infinity or NaN floating point numbers appear when calculating the transform matrix for a Collider. Scene hierarchy path "Jocie Kerman (Unloaded)/model01/jetpack01/jetpackCollider"

[ERR 16:39:08.948] Infinity or NaN floating point numbers appear when calculating the transform matrix for a Collider. Scene hierarchy path "Jocie Kerman (Unloaded)/capsuleCollider"

[ERR 16:39:08.956] Infinity or NaN floating point numbers appear when calculating the transform matrix for a Collider. Scene hierarchy path "Jocie Kerman (Unloaded)/ladderCollider"

[ERR 16:39:08.964] Infinity or NaN floating point numbers appear when calculating the transform matrix for a Collider. Scene hierarchy path "Jocie Kerman (Unloaded)/model01/female01/helmet01/helmetCollider"

[ERR 16:39:08.972] Infinity or NaN floating point numbers appear when calculating the transform matrix for a Collider. Scene hierarchy path "Jocie Kerman (Unloaded)/model01/jetpack01/jetpackCollider"

[ERR 16:39:08.980] Infinity or NaN floating point numbers appear when calculating the transform matrix for a Collider. Scene hierarchy path "Jocie Kerman (Unloaded)/capsuleCollider"

[ERR 16:39:08.987] Infinity or NaN floating point numbers appear when calculating the transform matrix for a Collider. Scene hierarchy path "Jocie Kerman (Unloaded)/ladderCollider"

[EXC 16:39:09.000] NullReferenceException
	KerbalEVA+<StartNonCollidePeriod>c__Iterator16.MoveNext ()
[EXC 16:39:09.010] NullReferenceException
	FlightGlobals.setActiveVessel (.Vessel v, Boolean force)
	FlightGlobals.ForceSetActiveVessel (.Vessel v)
	FlightEVA+<SwitchToEVAVesselWhenReady>c__Iterator11.MoveNext ()
[LOG 16:39:47.863] [FLIGHT GLOBALS]: Switching To Vessel MinLab ---------------------- 

It appears to be some sort of collider and/or NaN issue. I only have the usual basic mods (KAC (Fishbreath update), KER, NB-DAL), Chatterer, Serious Business, some flags, no part packs (well, KER parts). Here is the mod list. The only contact packs are 'Bases and Stations' and 'Tourism.'

Edited April 25, 2016 by StrandedonEarth