Yes, they chose to withhold the root cause for whatever reason. We can only speculate.
We don't need stories or fairytales, but starting with a simple, honest, transparent truth would be a good start.
I find that people respond to open status updates far better than silence or "we can't tell you anything" stuff.
And if you think this is just my illogical rambling, just look at those comments. People are not very happy about the lack of explanation and the fact that the case was locked mid-stream a couple of times, and it is hard to blame them.