Extremely dense hull on Match Surface Refine that's unnecessary?

I just created the blue surface from the edges of a fillet that previously trimmed the green surface, and when I hit Refine, I get this:

(EDIT: Huh… why do surfaces lose their color during a Match Surface?)

Now, if I just match without Refine and then trim and analyze the result, it’s within tolerance:

So why did Refine create these unnecessarily heavy segments? Why did it not realize it was already within tolerance?

match-refine.3dm (404.9 KB)