We saved the versions. Maintenance found one spacer rocking before closure and has retained it alongside a block that sits flat. No conclusion about the arm from that pair.

Does the same spacer rock on the specified inspection support, or only in this tray pocket?

It rocks on the inspection support too. Inspection found a raised edge outside the part requirement; that block is segregated. We still need the remaining stock checked and the accumulated point changes reviewed, so this isn't a claim that every poor grip had one cause.

Keep the rejected block identified with that finding; verify the approved setup using conforming stock before closing the handling issue.