There appears to be some related .rpt lines generated when the bug occurs.
Obsolete CfgSkeletons for OFP2_ManSkeleton, move to model.cfg
Warning Message: No entry 'config.bin.CfgSkeletons'.
Warning Message: No entry '.OFP2_ManSkeleton'.
Warning Message: No entry '.skeletonInherit'.
Warning Message: '/' is not a value
Warning Message: No entry '.skeletonBones'.
Warning Message: Size: '/' not an array
Warning Message: Size: '/' not an array
Warning Message: Size: '/' not an array
Warning Message: No entry '.isDiscrete'.
Warning Message: '/' is not a value
And a huge bunch of lines describing how the bones of OFP2_ManSkeleton have disappeared e.g:
Error: Bone face_cheekfrontleft doesn't exist in skeleton OFP2_ManSkeleton
Resulting 'non-existant Bone' spam in .rpt results in the log file being ~13MB in size so I cannot attach the full thing.