tab not closing for Phone layout (only SwiftUI mode) - delegate is nil for some reason

[kyzmitch]

TabPreviewCell 

@objc func close() {
        print("tab preview cell \(#function)")
        guard let closedIndex = tabIndex else {
            return
        }
        Task { [weak self] in
            await self?.delegate?.tabCellDidClose(at: closedIndex)
        }
    }

delegate is nil even before Task, and the owner of the cell which is TabsPreviewsViewController is not deallocated, can't fix it quickly.
After it fails to be closed if you try to close another tab it could crash with index out of bounds error.