I'm going to make a supposition here.
To a point, management tolerated SJAs interactions with the community. She was working on something that wasn't too secret - improving the AI is quite a reasonable public goal, and her interactions were quite good at subduing the dribbling plebs.
Now at some point they turned around and said that she was moving on to a new part of the project. One that was SUPERSEKRET, and in a naive way they thought that she'd be excited to be moved on to it. What they didn't take in to account is that she had become not only emotionally invested in her AI minions, but the admiration that she received from the forum and twitter.
They did not expect her to make such a public comment about moving role, and that her AI was potentially being abandoned.
It took a couple of days for the ripples to go from a small number of G+ followers, to her ill-advised tweet - once that happened it turned into an avalanche, and the hammer had to come down hard from management - as such they advised her to go completely silent.
With the focus being on GamesCon, they haven't yet had a chance to be able to respond to it, and they are more than likely aware that it WILL come up there as a question from some journalist (and god I can just see the dribbling masses on any live twitch stream shouting from the rafters "WHAT HAPPENED TO SJA?!?") - so I suspect they will be preparing an answer that they can deliver then. I'm sure something will make it's way out in some form of communication.
That make sense, however that also opens a can of worms regarding communication and control their of.