Did you notice how Equius' hive was not there in HS2 when Vriska was trying to figure out the Plot Point? Notice how none of the stuff Vriska tries to do heals her in any way? She is still scared of Doc Scratch, she still can't accept (Vriska).
What if Equius appearing, out of the b100, literally nobody even understanding what he is doing there (including himself), he's just there now. And it takes Vriska so out of the whole thing, that she escapes. Yes escapes, because she is stuck again. Repeating the same mistakes.
So she can't 'solve' this per se, but the sudden and unexplained appearance of a long time acquaintance shakes her hard enough to get out of it.
Im so sorry I have not read Homestuck 2 yet (stuck on the epilogues oops) but I still think this is an interesting read. This opens my mind to new thinking subjects when I get to HS2..
Though knowing homestucks weird nature; spontaneous arrivals of characters- especially if it's a person ones close with can change ALOT