Strange UICollectionView behavior when VoiceOver is enabled

I have UICollectionView

that each of its cells is UIWebView

where the last cell contains a link that clicks another screen UIViewController

on the screen. This button UIViewController

has a "back" button that pops the screen UIViewController

off and should display the last cell on again UICollectionView

.

This flow works fine when VoiceOver is turned off, however when VoiceOver is turned on, when the user presses the Back button, the collection view automatically scrolls back to the first cell.

I've searched for this to death but nothing works. Any suggestions?