Hi! This is probably either a corruption bug or a limitation. There is a reason that a snapshot can only be associative Design View Rep but not to Model State (LOD) and Pos Rep. It is because Model State and Pos Rep can change components' position, which can lead to overrides of overrides.
Though some users try to force the associativity by resolving to the assembly in a different Model State or Pos Rep, this can lead to corruption.
Model State and Pos Rep provide the initial position of the components to be tweaked. Once the tweaks are added, the snapshot will be irrelevant to the Model State or Pos Rep.
Many thanks!
Johnson Shiue (johnson.shiue@autodesk.com)
Software Test Engineer