> if it was "frozen" before, then wouldn't the resulting fit be even more similar in the old case, compared to what it is now.
> Nominally, at 10 GeV there is no power from the muon detector hits and the global muon track fit should be very similar at IP as the inner/tracker track.
No, it was Frozen with a very Large Error, while now, when refit, will re-acquire the “usual error”, so Tracker eta/phi will dominate

v.