Problems with Tag Set Link Model?

(Incomplete Feature, Closed -> Fixed, Priority: High, Test Status: No automated tests yet , Reported By Bad Link: Thing 3y284of not found, )
Summary: Prompts for Link Model aren't always filtering properly? May be related to changing the Link Model after creation?
Reported by Alexx:
I changed the Link Model of Property Heroes2 from "SOTM Card Model" to "SOTM Hero". When I type text into a field with that property (ie "12 3 2013 2"), it seems to select from all possible matching Things, not just things of that Link Model. For example, typing in "leg", brings up both "Legacy" (correct) and "Iron Legacy" (which is of Model "SOTM Villain").

Alexx: Having created a new version of this in my own space, I am not seeing the issue when I had created with the correct Link Model from scratch, So that ups the odds that changing the Link Model was what caused the strange behavior.
Justin: Wow, that's baffling. I see the behaviour you're talking about, both the bad behaviour in your original prototype and the correct behaviour in the fixed-up Space. But I'm mystified as to how changing the Link Model could fail like that. I'll have to dig deep into this one...
Justin: Ahhh -- duh, I was over-thinking the problem. Looking at this more closely, the difference between your prototype and your main Space is that, in the Space, the Property is a set of Links, whereas in the prototype it is a set of Tags. Turns out that Link Model is totally not working for Tag Sets -- must have been something I meant to implement and forgot. (Links, and Link Model, were added long after Tag Sets: looks like I didn't finish back-porting Link Model to Tags.)
Should be an easy fix, I think, so I'll plan to do that ASAP...