I'm fine with the idea that they won't share specifically that they fired someone for a specific reason. The surprising part, to me, is that they can't share if it was company's decision to end the relationship. My understanding was that if you just up and quit, then you don't qualify for unemployment benefits.
And I hasten to add that I'm fine being wrong on this point. Surprise can last a bit, though. :D
What they tell unemployment can be different from random "companies". Large companies have a policy of only given dates worked and "left in good standing" (or rarely not - but not is something they can be sued for and so rarely given because best case it will cost them half a million in lawyers fees if they win in court)
And I hasten to add that I'm fine being wrong on this point. Surprise can last a bit, though. :D