Damn what a good chapter.
“You won’t. I’m sure good things will come your way.” made me a bit emotional, and the most beautiful cityscape spreads on next few pages, love it.
My best guess is that the first time it was Nodoka who did the inviting, and despite agreeing, her mindset was clearly on "I don't want Yorumun to leave", so the summoned spirit acted defensively for her sake.
The second time, it was the actual Mikamo who summoned her, and the spirit acted more according to the greater good she aspired to.
I think.