Actually, they haven't. At least, as far as i can tell (they each have tens of actions on them and i can't read every decision :P).

They have been found "likely to have serious questions of validity".

This is basically the standard you must meet to get a review. That's why they were found that way.

Next, an actual trial will occur. But they are not "provisionally invalid" or anything like that.

There is literally no decision yet from PTAB, and in fact, the only reigning decision on validity is the appeals court.