I don't know, lots of things fall into that category.
Now if it had been me I would have sent in the I 407 back then, that is the best clearest route. In my mind.
The more common situation I have come across is where someone has say a 10 year GC and leaves and is gone many many years, well they have clearly abandoned their status, but gets let back in as a GC Holder.
Now this is even messier. I have a feeling that what should happen does not usually, but not sure. Also possible that action was taken and they do not know. Just throwing it out there.