Having this issue as well, we are also using our own shared frameworks. Same branch signed on Xcode 11 is okay though?

Thanks @J0hn but I noticed this creates a little white view during dismissal. I've done this for now so when you drag you still see the preview's view. func previewController(_ controller: QLPreviewController, transitionViewFor item: any QLPreviewItem) -> UIView? { if controller.isBeingDismissed { return controller.view } return nil }