@Pearse, I can repro your issue. From what I can gather, there is a bug in the code that gathers animation data from morph targets in the scene. It succeeds on the first and then fails for all other morph targets in the scene. If you enable Export non-animated node targets we bypass that part of the code and get all morph target animations within a group. This is a work around for now. I will open a bug on the exporter.
