iOS 26 Full Keyboard Access with custom UITableViewCell

On iOS 26 with Full Keyboard Access enabled, a UITableView(style: .grouped) with custom cells only enumerates section 0 in the Ctrl+Tab focus order (But it works with arrow keys). Cells in sections 1+ are reachable via arrow keys, and canFocusRowAt fires and returns true when arrows spatially reach them — but Tab leaves the table after the last row of section 0 and jumps to the next focus item outside the table.

Same code works correctly on iOS 18.x.

focusGroupIdentifier strategies (single ID on the table, same ID across view/table/every cell, unique ID per cell) have no effect. tableView.allowsFocus is true.

Is this a known iOS 26? Has anyone else run into this?

  final class CardCell: UITableViewCell {
      private let cardView = UIView()

      override init(style: CellStyle, reuseIdentifier: String?) {
          super.init(style: style, reuseIdentifier: reuseIdentifier)
          cardView.backgroundColor = .white
          cardView.translatesAutoresizingMaskIntoConstraints = false
          contentView.addSubview(cardView)
          NSLayoutConstraint.activate([
              cardView.topAnchor.constraint(equalTo: contentView.topAnchor),
              cardView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
              cardView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
              cardView.trailingAnchor.constraint(equalTo:
  contentView.trailingAnchor),
          ])
      }
      required init?(coder: NSCoder) { fatalError() }
  }

  // Table: UITableView(style: .grouped), 3 sections, register CardCell.
  // Reproduce on iOS 26 with FKA on → Tab from section 0 leaves the table,
  // skipping every cell in sections 1+.