Return to Rest not Behaving as Expected?

@Drigax or @Evgeni_Popov What would have caused this:

To stop working now? Its the same one that we proofed initially the process was working. Now I go back and look and its broken again?

It was working back at this post:

XD

In this version of the PG if you wait for it to load and then go into the inspector select the bone viewers mesh and toggle compute bones using shaders first on then off the viewers spurs end up in the correct location.
image
image

… this is starting to get nutty.