fairing sides just fall off

[Schnobs]

cue Clarke & Dawe, "The front fell off":

I'm having a problem with proc fairing sides falling off at the slightest provocation. Like, the when rolling out the vessel or when landing (doesn't need to be a very rough landing). Having KJR or not doesn't make the slightest difference. It's not 100% reproducible but even a little jolt has a significant chance of triggering the issue.

Just now it happened to a vessel floating in space while I was moving about unrelated parts with KIS.

Player log of the game session: http://ksp.schnobs.de/stuff/fairing_loss_Player.log.gz (35MB unzipped). The following might be useful search terms in the lengthy log:

ArgumentOutOfRangeException: Argument is out of range.
Parameter name: index
  at System.Collections.Generic.List`1[UnityEngine.ConfigurableJoint].get_Item (Int32 index) [0x00000] in <filename unk
nown>:0 
  at PartJoint.OnJointBreak (Single breakForce) [0x00000] in <filename unknown>:0 
(Filename:  Line: -1)