Maybe. It would kind of depend on the situation. Ultimately, what this comes down to is the existence of a closed release, and how closed is too closed. In general, our rule of thumb is if there exists a member of the general public that can access the game, then it's kosher, however, I don't think it's necessarily reasonable to argue that the gaming press are members of the general public. Although review copies do technically exist in the wild weeks before release for pretty much every game in existence, I don't think it's reasonable to call that a perfect loophole for every game ever.
I'm going to work through two recent examples: the Dark Souls 3 streamer release, and the Overwatch closed beta, which was not technically limited to streamers.
The Dark Souls 3 early release was available only to popular streamers. In general, when game companies give out copies like this to particular people in exchange for a review, or for free publicity, it is referred to as a press copy. And in this case, the release was limited to popular streamers only. In this particular case, I would say that questions about the game should wait until the game is released to the general public in any region. This is what happened anyway, so there wasn't really an issue.
The Overwatch closed beta, on the other hand, was different. That ran on a lottery system, where anyone who signed up was eligible to receive an invitation to the closed beta. It was not open only to a limited group (well, I guess it was open only to those who had a Battle.Net account, and indicated they were interested in being invited to the beta), so in this sense, that was open to the public, and questions should be allowed. Again, though, the game is released now, and to my knowledge, no questions were asked during the closed beta.