When Close/Pop View back to CollectionView - cell forces open

[iamdavidw]

I'm having an issue whereby when I'm trying to close the pushed view controller, it is animating down to the center (as if the cell is closed) and then upon completion the cell snaps and jolts back to being open again. How can I override it so that the cell is always closed, when you exit the pushed VC?

Looking up and down throughout the code, and whilst it's a beautiful piece of work... it is a nightmare to find out what is calling that last change.