Awear

If you're already there in the story, you can just go in GDC apartment and then get out, this should fix the day/night cycle issue.

I had the same issue, and then realized my day/night cycle was broken as well. I went in GDC appartment and got out and it fixed my issue.

The crest description actually doesn't say a lot of what is actually does. First of all, switching from one stance to another can be done using any damaging move (switch to Attack Stance) or using any non-damaging move (switch to Defense Stance), and this is not restricted to Attack and Defense Order only. The crest also add an Infestation effect to the Attack Order move. It also provides a leftover effect to its holder (might actually only works in Defense Stance, I'm not sure about that...) By the way, Vespiqueen, unlike Aegislash, enters the battle in Attack Stance (there's no notification of it on the screen though).