Managed to find a workaround, though I suspect it’s actually the proper way to AMA link.
I pulled all the .R3D files (copied actually) out of the subfolders and dropped them into a new folder and linked to that. Worked flawlessly.
I do have the AMA plugin installed. When you say “in the AMA window” do you mean in SETTJNGS? My only option (8.0 MC) if AMA LINK. No more link to folder/link to file option.