Maybe my problema is equals to:
Force Touch animation freezes if gently touched
App is freezing in 'peek and pop' implementation in iPhone 6s
1)
PROBLEM SOLVED
I've found the solution. The problem was a "redundant" Peek and Pop registration. I was registering:
1) Call registerForPreviewingWithDelegate(self, sourceView: view) on viewDidLoad()
registerForPreviewingWithDelegate(self, sourceView: view)
viewDidLoad()
2)
Maybe they conflict with each other and to solve this I've deleted the storyboard segue.